The Comps Behind the Price.
And Every Marketplace After eBay.
ListForge identifies an item, researches sold comps and builds a full eBay listing with item specifics, on iOS, for $19 a month. Underpriced AI does the same research and shows you the comps, adds a calibrated range with three list prices and a two-week sell chance, the net after fees and a worth-it verdict, then sells on eBay in 10 markets, Bonanza and 12 more marketplaces, from the web, iOS and Android, with plans from $5 a month.
Free first scan, no card. Then plans from $5/mo or credit packs from $4.
Identify → Research → List. Then the Rest of the Job.
Automated sold-comp research and a complete eBay listing with item specifics is exactly the right loop, and ListForge runs it well on an iPhone. Underpriced AI keeps that loop and extends it in the places resellers feel most: what you can see behind the price, where you can sell, and what happens after the item is listed.
Comps you can see
The real eBay sold comps behind every price, a calibrated range, and three list prices (fast, market, patient), each with its two-week sell chance.
Every marketplace
Publish to eBay in 10 markets and Bonanza from the app. A free extension fills the form on 12 more marketplaces, and a paste kit covers the rest.
After the listing
Inventory with cost, location, tags, SKU and barcode labels. Mark items sold, track profit, and export a tax report at year end.
Underpriced AI vs ListForge
| Feature | Underpriced AI | ListForge |
|---|---|---|
| Identify any item from a photo | ||
| Automated sold-comp research | ||
| Shows the sold comps behind each price | Every price, with the comps | Not stated |
| Calibrated range + three list prices (fast, market, patient) | With a two-week sell chance | Not stated |
| Net after eBay fees + worth-it verdict | Not stated | |
| Full eBay listing with item specifics | ||
| Publish to eBay from inside the app | 10 country markets | Not stated |
| Publish to Bonanza | Not stated | |
| Crosslist to other marketplaces | Free Chrome + Firefox extension: Facebook, Poshmark, Mercari, Depop, Whatnot, Vinted, OfferUp, Etsy, District, Craigslist, 1stDibs, Ruby Lane | Not stated |
| Paste kit for any other marketplace | Not stated | |
| Inventory: cost, location, tags, SKU, barcode labels | Not stated | |
| Mark as sold + profit tracking | Not stated | |
| Tax report export | Not stated | |
| Connector for Claude, ChatGPT and coding assistants | MCP | Not stated |
| Platforms | Web, iOS, Android, Chrome, Firefox | iOS |
| Free to start, no card | Free first scan | Free tier, 50 listings |
| Starting price | $5/mo or a $4 credit pack | $19/mo |
Comparison based on publicly available information as of September 2026. “Not stated” means the feature is not described in ListForge's public material; it may still exist. ListForge's features, platforms and pricing can change; check their site for current details.
From Photo to Sold
1. Photograph It
Point your phone at any item. The AI identifies the brand, model, maker and era from the photo. No barcode or typing required.
2. See the Whole Price
Real eBay sold comps, a calibrated range, three list prices with a two-week sell chance, the net after eBay fees, and a worth-it verdict against what you would pay.
3. List Everywhere
Publish to eBay (10 markets) or Bonanza from the app, then let the extension fill the form on Facebook, Poshmark, Mercari, Depop and eight more marketplaces.
What You Get Beyond the eBay Listing
Show Your Work
The sold comps behind every price, a calibrated range, and a published accuracy program: we measure our prices against independent sales, not against our own comps.
10 eBay Markets + Bonanza + 12 More
Publish to eBay in the US, UK, CA, AU, DE, FR, IT, ES, NL and BE, plus Bonanza. The free extension fills the form on Facebook Marketplace, Poshmark, Mercari, Depop, Whatnot, Vinted, OfferUp, Etsy, District, Craigslist, 1stDibs and Ruby Lane. See how crosslisting works.
Inventory, Profit and Taxes
Log cost, location, tags and SKU, print barcode labels, mark items sold, track profit per item, and export a tax report.
Every Platform, Including Your AI Assistant
Web app, iOS, Android, Chrome and Firefox, plus an MCP connector so Claude, ChatGPT and coding assistants can price an item and pull the comps inside the chat.
Which Tool Is Right for You?
Choose Underpriced AI if you...
- Want to see the sold comps and a calibrated range, not just one number
- Sell beyond eBay: Bonanza, Facebook Marketplace, Poshmark, Mercari, Depop, Whatnot, Vinted, Etsy and more
- Want the net after eBay fees and a worth-it verdict before you buy
- Use Android, a desktop browser, or a mix of devices
- Track inventory, cost, profit and a tax report in the same tool
- Prefer a $5/mo plan or credit packs from $4, with a free first scan
ListForge may be a good fit if you...
- Do everything on an iPhone and list only on eBay
- Want to try it on the free tier of 50 listings first
- List in high enough volume that a flat $19/mo works out for you
- Just need identification, comps and the eBay listing, and nothing after it
Simple Pricing
Your first scan is free with no card. After that, plans start at $5 a month and credit packs start at $4 with no subscription. See all plans. As of September 2026, ListForge is $19 a month with a free tier of 50 listings; check their site for current pricing.
Frequently Asked Questions
How is Underpriced AI different from ListForge?
Both identify an item with AI, research sold comps automatically, and build a full eBay listing with item specifics. As of September 2026, ListForge is an iOS app at $19 a month with a free tier of 50 listings. Underpriced AI shows you the sold comps behind the price, adds a calibrated range and three list prices (fast, market, patient) with a two-week sell chance, the net after eBay fees and a worth-it verdict, publishes to eBay in 10 markets and Bonanza from inside the app, fills the listing form on 12 more marketplaces with a free browser extension, and tracks inventory and profit. It runs on the web, iOS and Android, with plans from $5 a month.
Does Underpriced AI show the sold comps, or just a price?
You see the comps. Every price is built from real eBay sold listings and you can look at them yourself. Around the comps you get a calibrated range and three list prices with a two-week sell chance for each. We also run a published accuracy program: our prices are measured against independent sales, not against our own comps.
Can I sell anywhere other than eBay?
Yes. Underpriced AI publishes to eBay in 10 markets (US, UK, CA, AU, DE, FR, IT, ES, NL, BE) and to Bonanza from inside the app. A free Chrome and Firefox extension fills the listing form on Facebook Marketplace, Poshmark, Mercari, Depop, Whatnot, Vinted, OfferUp, Etsy, District, Craigslist, 1stDibs and Ruby Lane, and a paste kit covers any other marketplace. As of September 2026, ListForge's public material describes the eBay listing; check their site for anything beyond eBay.
Does Underpriced AI run on Android or the web?
Yes. There is a full web app plus iOS and Android apps, and the extension runs in Chrome and Firefox, so you can scan on your phone and manage inventory and listings from a desktop. As of September 2026, ListForge is an iOS app.
What does Underpriced AI cost compared to ListForge?
Underpriced AI gives you a free first scan with no card, then plans from $5 a month or credit packs from $4 with no subscription. As of September 2026, ListForge is $19 a month with a free tier of 50 listings. If you list in very high volume on eBay only, compare the per-listing math on both; if you list occasionally or sell on several marketplaces, the lower entry price and the extension usually win.
Can I use Underpriced AI from Claude or ChatGPT?
Yes. An MCP connector lets Claude, ChatGPT and coding assistants price an item, pull the sold comps and get a worth-it verdict right inside the chat. Set it up at underpricedai.com/mcp.
Prefer real sold-data pricing? Get more of our guides in Google Search.
See the Comps. Then Sell It Anywhere.
Scan an item, see the real sold comps and the range behind its price, and list it on eBay, Bonanza and a dozen more marketplaces. Try Underpriced AI on web or mobile. Your first scan is free, no card.
Try a Free Scan