FlipCheck: snap a thrift find, get a fair price and a ready listing (Gemma 4 + TabPFN)

Description and use

FlipCheck speeds up pricing and listing creation for eBay, Vinted, and car‑boot sellers by using Gemma 4 to identify items and generate descriptions, and TabPFN to instantly estimate prices from live eBay listings.

Problem

Resellers spend up to ten minutes per item researching what it is, its market value, and crafting a listing, which reduces profit when handling many items.

Outcome

FlipCheck reduces research time from minutes to seconds, enabling sellers to price and list dozens of items per weekend with higher accuracy and consistency.

Workflow

• Snap photo of item
• Gemma 4 identifies item and outputs JSON (title, brand, model, condition, search query, confidence)
• Query SerpApi for up to 200 current eBay listings matching the search
• Clean listings: remove sponsored, bulk lots, unrelated titles, and outliers
• Feed cleaned listings to TabPFN to predict 25th, 50th, 75th percentile prices for the item’s condition
• Gemma 4 generates eBay title (≤80 chars), description, and item specifics
• Present results to user with copy buttons for each field

Evidence

FlipCheck does that research from one photo: 1) What is it? An open vision model names the item: brand, model, visible condition, and the search a seller would type.

Source

It pulls live eBay listings for that search and prices your item’s condition as three numbers: quick sale, fair, and if you can wait.

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An eBay title (80 characters max), an honest description and item specifics, each with a copy button.

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Gemma 4 gets the photo and must answer in a strict JSON schema: title, brand, model, condition, search query and confidence.

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TabPFN is a tabular foundation model. It fits a small table in one forward pass, with no training run.

Source