Underpriced AI – Snap a photo, get instant resale value with AI
Hey HN, I built Underpriced AI to solve a problem I had as a part-time reseller: standing in a thrift store trying to figure out if something is worth buying. How it works: - Snap a photo of any item - AI identifies the brand, model, maker, era, etc. - Pulls recent sold prices from eBay and other marketplaces - Gives you an instant valuation with confidence score You can also generate SEO-optimized eBay listings and publish directly from the app. Tech stack: Next.js, Claude API for vision/analysis, eBay API for market research and listing. The "Quick Scan" feature is designed for mobile…
In plain words
Underpriced AI helps resellers determine whether items are worth buying by analyzing product photos. Users snap a picture of an item, and the app identifies the brand, model, and era, then pulls recent sold prices from eBay and other marketplaces to provide an instant valuation with a confidence score. The tool also generates SEO-optimized eBay listings that can be published directly from the app. A free tier is available.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey HN, I built Underpriced AI to solve a problem I had as a part-time reseller: standing in a thrift store trying to figure out if something is worth buying. How it works: - Snap a photo of any item - AI identifies the brand, model, maker, era, etc. - Pulls recent sold prices from eBay and other marketplaces - Gives you an instant valuation with confidence score You can also generate SEO-optimized eBay listings and publish directly from the app. Tech stack: Next.js, Claude API for vision/analysis, eBay API for market research and listing. The "Quick Scan" feature is designed for mobile – get a price check in seconds while you're out sourcing. Free tier available. Would love feedback from anyone in the reselling space or who's worked on similar pricing/valuation problems. https://underpricedai.com
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