AI arbitrage for resellers. Let AI do the work between the buy and the sale.

Drop the photos. AI grades and prices every piece, your crosslister lists it, and SoldLoop prints the label and counts the profit when it sells. See the whole loop run live on a real buy.

A free live walkthrough. No card, nothing to install first.

Overview
September 2026
Profit on pieces sold$2,538142 pieces sold
Sales$4,862$34.24 average
Fees$1,006Marketplace fees and labels
Cost of pieces sold$1,318From 4 buys
Cash in stock$2,104286 pieces, at cost
To ship3 sold, waiting
  • Carhartt Detroit jacket, brown duck, L$88OS4-018eBayLabel ready
  • Levi's 550 relaxed, 34 × 30$32OS4-021PoshmarkLabel ready
  • Harley-Davidson tee, 2004 Sturgis, XL$45TR3-007DepopNeeds label
BuysOpen
Workwear mix, 50 lb+$595
Oak Street Wholesale · $412 landedprofit on sold
31 of 58 sold · 53% sell-through$174 in stock
An example workspace with made-up figures, not anyone's results.

Three tools, one loop.

The hours between buying inventory and getting paid are work AI can do now. That's what we mean by AI arbitrage. SoldLoop is the part we make, and it's built to run with a crosslister and with Claude.

SoldLoopThe part we make
  • Grades and prices every piece from your photos
  • Knows what each piece cost you
  • Fills your crosslister's item form, photos included
  • Fetches the label and prints it as an exact 4×6
  • Shows what every sale made after fees
VendooYour crosslister
  • Lists on eBay, Poshmark, Depop, Facebook and Whatnot
  • Notices when a piece sells
  • Takes it down everywhere else
ClaudeOptional
  • Works in your own Chrome, signed in as you
  • Fills each marketplace's form in Vendoo and presses List
  • Publishes only when you tell it to

Vendoo and Claude are separate subscriptions from their own companies. SoldLoop is independent and isn't affiliated with Vendoo or with Anthropic, which makes Claude.

What SoldLoop does in the loop.

Your crosslister puts the piece in front of buyers. SoldLoop does the work on either side of that: what you bought, what each piece is, the label that gets it out the door, and what it made.

Buys

Log what you paid, once.

Enter the buy, whether it's a bale, a wholesale lot or a thrift run, with its supplier, price, freight and tax. SoldLoop spreads the landed cost over the pieces by what each one is worth, so a $90 jacket carries more of it than a $12 tee.

Workwear mix, 50 lb · 58 pieces
Price paid$360.00
Freight$38.00
Sales tax$14.00
Landed cost$412.00
Spread by value
Carhartt jacket, valued $90$21.31
Graphic tee, valued $12$2.84

Pieces

Photos in, listings ready.

Drop the photos from a sort, one folder per piece or grouped with a tap. AI grades each piece A to D, writes the title and description, and prices it above a floor that protects your margin after fees. Every piece gets a short SKU and its cost. Send all to Vendoo then fills Vendoo's item form for every piece, photos included, and holds back anything that looks like a piece you already listed.

OS4-018Grade A

Carhartt Detroit jacket, brown duck, blanket lined, L

Light wear at the cuffs. No holes, no stains.

Price
$88
Floor
$38
Cost
$21.31

Money

Real profit, not a guess.

Every sale, fee and label in one ledger: profit per piece, buy, supplier and month, and the cash still tied up in stock. Sales come in from your shipping labels, your Vendoo export, or Mark sold, dated in your own time zone. Refunds and returns come off the sale they belong to. Export a CSV when it's time to do taxes.

Profit by supplierThis year
Oak Street Wholesale61% sold+$3,410
Thrift runs72% sold+$1,186
Estate lot, June38% sold+$212

Ship

The label is waiting when it sells.

Open Ship and the Chrome extension fetches your Poshmark, eBay, Depop and Whatnot orders and labels from your own browser, each one landing on the piece that sold. eBay's Letter-size page is cropped and turned so it prints as an exact 4×6, and your thank-you message for the buyer is one click away.

See the whole loop run, live.

A free walkthrough of the stack on a real buy, start to finish. At the end we show what it costs and how to set it up, and you can ask anything.

  1. 1A buy logged, and its photos turned into graded, priced pieces
  2. 2Those pieces sent to Vendoo and crosslisted by Claude
  3. 3A sale coming back: the label, the thank-you, the profit to the cent
  4. 4What the stack costs a month, and how to set it up
When
Being scheduled now. Tell us what suits you and we'll email the time.
Length
About 45 minutes, with time for questions
Cost
Free

Free. No card. We email you the time, the link and one follow-up after, nothing else.

Questions people ask first.

Something else on your mind? Talk to team

What is AI arbitrage?

Our name for a simple idea: the hours between buying inventory and getting paid for it are work AI can do now. Grading, pricing, writing listings, crosslisting, labels and the bookkeeping. SoldLoop does its share and is built to run with a crosslister and Claude for the rest. It isn't a course or a sourcing service, and it doesn't promise sales.

Is the walkthrough really free?

Yes. It's a live demo of the stack on a real buy. At the end we show what SoldLoop, Vendoo and Claude cost and how to start, and you can ask anything. There's nothing to buy to attend.

Do I need Vendoo?

If you want your pieces on several marketplaces at once, you need a crosslister, and Vendoo is the one SoldLoop is built next to: the extension fills Vendoo's item form for you, and your Vendoo export brings sales back. SoldLoop doesn't post listings anywhere itself. It also works with another crosslister, or with none if you list by hand.

Do I need Claude?

No. Without it you press List in Vendoo yourself. With it, Claude works in your own Chrome, fills each marketplace's form in Vendoo and lists the item when you tell it to. It needs a paid Claude plan, and the first listing day is the slow one, since every form gets filled once.

Which marketplaces does it work with?

Sales from eBay, Poshmark, Depop, Facebook Marketplace and Whatnot all count toward your profit. Labels print as an exact 4×6: eBay's Letter-size page is cropped and turned, and 4×6 labels from any marketplace print as they are.

How do sales get in?

Three ways: from shipping labels (dropped in, or fetched by the extension), from your Vendoo export, or with Mark sold on the piece. Each sale sits next to the piece's cost, so the profit is worked out for you.

Will labels print on my thermal printer?

If it takes 4×6 labels, yes. SoldLoop crops the label out of the marketplace PDF, including eBay's Letter-size page, and sets it on an exact 4×6 page, so you print at 100% with no margins to fiddle with.

What happens when a buyer returns something?

Record it on the piece. A refund to a buyer who kept it comes off that sale. A return undoes the sale, puts the piece back in stock, and keeps what it cost you in fees and labels on the books, so the month's profit stays honest.

Let AI do the work. Watch it happen first.