Every piece you sell is one of a kind. Does your software know that?
Buy It. Photograph It. List It on Shopify — in One Session.
Inventory management that connects to where you actually sell. Shopify today, eBay coming soon — managed from your phone or your desk, with VAT Margin Scheme handled automatically.
Purpose-built for dealers of unique items — jewellery, watches, antiques, handbags, vintage fashion, and more. Push to where your buyers already are.
49 of 50 founding member spots remaining. Lock in exclusive pricing for life — from just £49/month.
Locked in for life. Only for founding members. See full plans
What happens next
- Most people hear from us within 2 weeks
- Personal onboarding to get you set up
- Founding members pay from £49/month instead of £75 — locked in for life
Dashboard
Welcome back. Here's your stock overview.
47
32
12
£142,850
By Category
Sales Trend
These Problems Shouldn't Still Exist
Real problems faced by UK dealers every day, solved with GemJam's purpose-built features
"It Takes Longer to List an Item Than It Does to Buy It"
Buy a piece, then spend the next hour photographing it, typing the description into a spreadsheet, and copy-pasting the listing to Shopify and your website. Every. Single. Time.
GemJam Solution: Buy to Listed in One Session
- Push to Shopify from one place — eBay coming soon
- Photograph, describe, and list without leaving the app
- Stock levels sync automatically across channels
- One catalogue, every sales channel
- Photograph and catalogue items on your phone at fairs, house clearances, or auctions
"Every Piece is Unique — My System Treats Them All the Same"
A database that works for rings doesn't work for handbags. And each piece needs its own provenance, photos, and condition reports — but your current system can't keep up.
GemJam Solution: Flexible Item Management
- Unlimited image uploads with certificates and appraisals
- Category-specific fields (hallmarks for jewellery, movement type for watches, designer for handbags)
- Custom SKU configuration for unique item codes
- Create your own templates as your inventory evolves
"I'm Drowning in Receipts and Paying a Bookkeeper to Sort Them Out"
Purchase invoices scattered across email, folders, and filing cabinets. Spending hundreds a month just so your accountant gets clean records.
GemJam Solution: From Purchase Receipt to Accountant-Ready Report
- Digital invoice storage with instant retrieval
- Every purchase and sale recorded with full audit trail
- Automatic profit calculations with VAT margin scheme applied
- Export-ready reports your accountant can use directly
"VAT Margin Scheme Calculations Keep Me Up at Night"
Calculating VAT on the margin for second-hand goods is incredibly complex. Never confident it's correct for HMRC.
GemJam Solution: Automated VAT Compliance
- Automated VAT margin scheme calculations (16.67% on profit)
- Purchase VAT status tracking for margin eligibility
- Dual invoice formats (customer-facing vs accounting)
- HMRC-compliant documentation and reporting
Built on Trust
Complete Data Isolation
Each organisation's data is completely isolated at the database level using Row Level Security. No other organisation can see your stock, contacts, or margins through the application — it is technically impossible, not just a policy.
Founder Commitment
The founder is stepping back from dealing to focus on GemJam full-time. Your success is our business model.
GDPR Compliant
Full compliance with UK and EU data protection regulations. Your data is handled responsibly.
Three Things That Actually Matter
Your inventory has provenance. Shouldn't your business tools understand that?
Buy to Listed, Connected
Purchase an item and push it to Shopify — all from one place. eBay coming soon. No copy-pasting, no re-entering details.
- Push to Shopify from your inventory — eBay coming soon
- Purchase-to-listing in one session
- Multi-channel stock sync
PUR-2026-0042
Hatton Garden Estates · 15 Feb 2026
Subtotal
£8,250.00
VAT
£0.00
Margin Scheme
Total
£8,250.00
Line Items
Art Deco Diamond Ring, c.1925
JWL-2026-0089
£3,450.00
AvailableVictorian Pearl Brooch
JWL-2026-0090
£1,800.00
SoldCartier Tank Watch, 1970s
WCH-2026-0034
£3,000.00
AvailableFind Anything in Seconds
That receipt from three years ago? The provenance document for the Georgian brooch? Found instantly, not after an hour of digging.
- Searchable invoice and receipt storage
- Unlimited images and documents per item
- Complete supplier and customer history
Inventory
6 items
Art Deco Diamond Ring
JWL-2026-0089
Cartier Tank Watch
WCH-2026-0034
Georgian Silver Candelabra
ANT-2026-0056
Hermès Birkin 25
HBG-2026-0012
Edwardian Sapphire Pendant
JWL-2026-0091
Rolex Datejust 1601
WCH-2026-0035
VAT Compliance That Runs Itself
Stop thinking about margins at all. GemJam tracks which purchases qualify and handles the VAT in the background. Your stock book, export register, and VAT return are always up to date — no quarterly scramble.
- Automatic margin calculations (16.67% on profit)
- Purchase eligibility tracking
- Reports ready for your accountant — always current, never a scramble
VAT Return Report
Q1 2026 · 1 Jan 2026 – 31 Mar 2026
£4,216.50
VAT due on sales
£1,840.00
VAT reclaimed
£2,376.50
To pay HMRC
MTD Box Values
From Purchase to Live Listing in Three Steps
No copy-pasting between platforms. No manual listing. Buy an item and have it live on Shopify before you leave the fair.
Step 1:Buy and catalogue
Purchase an item, photograph and catalogue it on your phone — at the fair, the house clearance, or the auction. GemJam captures the cost, provenance, and VAT status right at the point of purchase.
Step 2:Push to your sales channels
List the item on Shopify directly from GemJam. One catalogue, one click — no copy-pasting. eBay coming soon.
Step 3:Sell and sync automatically
When the item sells, profit and VAT Margin Scheme calculations happen automatically. Export to Xero-compatible format or email to Dext — no paperwork pile-up.
You wouldn't trust a generalist to value your stock. Why trust one to run your business?
Claim Your Founding Member SpotFounding Member Pricing
Exclusive pricing for the first 50 dealers. Billed monthly. Locked in for life.
Solo
Founding MemberLocked in for life
For the independent dealer running a single operation.
Save £312/year vs standard pricing
- 1 user · 1 location · 1 sales channel connection
- Full inventory management — unlimited items
- Purchase and sales tracking
- VAT Margin Scheme calculations
- Stock Book, Export Register, and VAT Return
- Accounting export (Xero/Dext format)
- Custom templates (custom fields coming soon)
- Email support
Professional
Recommended Founding MemberLocked in for life
For dealers with a team or selling on multiple platforms.
Save £432/year vs standard pricing
Everything in Solo, plus:
- Up to 3 users with role-based access (invites coming soon)
- Up to 3 locations
- Up to 3 sales channel connections
- Sales Performance report
- Supplier Analytics report
- Inventory Valuation report
- Priority support
Business
Founding MemberLocked in for life
For established galleries and high-volume dealers.
Save £852/year vs standard pricing
Everything in Professional, plus:
- Up to 6 users (invites coming soon)
- Unlimited locations
- Unlimited sales channel connections
- API access and webhooks
- Price encoding
- Advanced SKU configuration
- Admin tools
- Dedicated support
Common Questions
Straight answers to the things dealers ask most.
Every organisation's data is completely isolated from other organisations at the database level using Row Level Security. Within the application, no organisation can access another's data. The founder is stepping back from dealing to focus on GemJam full-time — your success is our business model. We have zero reason to look at your data and every reason to protect it.
GemJam was built by a dealer, not a tech company. If you can use a spreadsheet, you can use GemJam. We'll walk you through setup personally — founding members get one-to-one onboarding to make sure you're comfortable before you're left on your own.
The VAT Margin Scheme is a special UK VAT arrangement for dealers of second-hand goods. Instead of charging VAT on the full selling price, you only pay VAT on the profit margin (selling price minus purchase price). GemJam calculates this automatically for every sale, tracks which purchases qualify, and generates HMRC-compliant reports.
Yes. You can import directly from Shopify, upload a spreadsheet, or add items one by one. Each piece gets its own record with photos, provenance, and purchase details. We'll help you get set up during your personal onboarding session.
You deal in things with history. Your software shouldn't look like it is stuck there.
Claim Your Founding Member SpotWhat's Coming
We're building the tools dealers have been asking for. Here's what's next.
Dealer-to-Dealer Payments
Send invoices and collect payments directly through GemJam. No more chasing bank transfers or juggling payment apps.
Marketplace Integrations
Push your inventory directly to eBay, 1stDibs, and more — with stock levels synced automatically.
AI-Assisted Listings
Generate item descriptions from your photos and purchase details, ready to publish in seconds.
Still Copy-Pasting Between Spreadsheets and Shopify?
The first 50 dealers to join get founding member pricing — locked in for life. Once they're gone, they're gone.