Your Back Market prices, turned into sourcing prices. Every day.
For refurbished phone sellers on Back Market. Connect your API token and Assay turns today's price to win into two numbers per listing: what you will actually get, and the most you can pay to still hit your margin. No exports. No spreadsheets.
Your API token is encrypted and never shown. Data hosted in the EU.
The problem
Back Market shows you prices. It does not show you what is left after commission, payment fees, shipping, CCBM, levies and VAT.
So you export the data, rebuild the spreadsheet and wait for accounting. That is hours of work every week, just to answer the most important question in the business: what is this device worth to me?
How it works
- 1
Sign up.
Create an account with your email.
- 2
Connect Back Market.
Paste your Back Market API token. We test the connection before saving.
- 3
Get usable prices.
Assay regularly syncs your listings and the price to win in each market. You see what you will get for a device and what you can pay for one, at today's price level.
Where the money goes: a real example
iPhone 15 128GB Black, Excellent, France (FR). Back Market price to win: €467. Settings: commission 12%, payment fee 2%, CCBM €4.99, shipping €10, French Private Copying Levy €8.40, minimum margin €25, Marginal VAT rate 24%, Standard VAT 20%, commission VAT reverse charge.
| Line | Marginal | Standard |
|---|---|---|
| Price to win | €467.00 | €467.00 |
| Commission (12%) | −€56.04 | −€56.04 |
| Payment fee (2%) | −€9.34 | −€9.34 |
| CCBM | −€4.99 | −€4.99 |
| Shipping | −€10.00 | −€10.00 |
| Private Copying Levy | −€8.40 | −€8.40 |
| Sale VAT (20%, included in the price) | n/a | −€77.83 |
| Net price (break-even purchase price) | €378.23 | €300.40 |
| Your margin | −€25.00 | −€25.00 |
| Margin VAT (24% on your margin) | −€6.00 | n/a |
| Max sourcing price | €347.23 | €275.40 |
Pay up to €347.23 for this iPhone (Marginal) or €275.40 excl. VAT (Standard) and you still keep €25.
What you see
- Two lines per listing: Marginal and Standard.
- Net price and max sourcing price, recalculated from your own fees and margin rule.
- Buybox status: winning or losing, and the price to win.
- What changed: buybox gained or lost and price moves, compared with the last sync, yesterday or last week.
- Filters by market, grade and VAT type. Export to Excel or CSV.
Trust and security
- Your Back Market API token is encrypted and never shown again after saving.
- EU hosted.
- You set every fee yourself, and the info notes in the app explain how each number is calculated.
Veiko Strauss
Founder, Assay Pricing · ex-Head of Marketplaces, Foxway
"I spent nearly four years running marketplaces at Foxway, a leading Nordic recommerce group. Over that time we grew from one channel at about €5M to roughly €80M GMV across Back Market, refurbed, MediaMarkt, Amazon, eBay, Fnac and Dipli. I built and ran our in-house pricing engine against an 18 to 23% margin target, and I know the refurb basics up close, from the VAT margin scheme to sourcing. Assay is the tool I wished I'd had: what a device will really sell for, and the most you can pay for it."LinkedIn (opens in a new tab)
FAQ
Where do I find my Back Market API token?
Sign in to your Back Market seller Back Office and open Options, then Integrations. Select Add new integration, choose Direct API Connection and confirm. Copy the token and paste it into Assay. If you already use another integration tool, you can reuse its existing token.
Can Assay change my prices on Back Market?
No. Assay has read-only access. It retrieves your listings and Back Market's current prices, and it never edits prices, listings or orders on your account.
Which VAT schemes and markets are supported?
Every listing is shown under both the Marginal VAT scheme and Standard VAT, side by side. Assay covers all Back Market markets that trade in euros.
Can I use my own cost structure?
Yes. Back Market commission is applied automatically per market. You define the rest, including payment fees, shipping, CCBM, Private Copying Levy and your minimum margin, and every price updates to match.
How often are prices updated?
Assay syncs your listings automatically, and you can refresh at any time with Sync now.
Is my API token secure?
Your token is encrypted before it is stored, is never displayed again, and is hosted in the EU.
What does it cost?
Assay is free during the beta.