A Fast eBay Draft Is the Start.
The Comps and Crosslisting Are the Rest.
FlowLister turns photos into an eBay-ready draft in about 30 seconds, with a sold-comp price and 20 plus item specifics, and publishes in one click. Underpriced AI builds the same listing from the same kind of sold data, then shows you the comps, a calibrated range with three list prices and a two-week sell chance, the net after fees and a worth-it verdict, and takes the listing past eBay: Bonanza from the app, and 12 more marketplaces through a free extension.
Free first scan, no card. Then plans from $5/mo or credit packs from $4.
Photos → Draft → Publish. Then the Rest of the Job.
A 30-second draft with the item specifics already filled in is a real time saver, and one-click publishing is the right loop. 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.
Past eBay
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 FlowLister
| Feature | Underpriced AI | FlowLister |
|---|---|---|
| Photos to a priced, eBay-ready listing | About 30 seconds | |
| Price from real eBay sold comps | ||
| 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 | |
| Item specifics filled in | 20 plus | |
| Publish to eBay from inside the app | 10 country markets | One click (Trading API) |
| 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 | No crossposting (per FlowLister) |
| 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 | Check their site |
| Free to start, no card | Free first scan | Check their site |
| Starting price | $5/mo or a $4 credit pack | Check their site |
Comparison based on publicly available information as of September 2026. “Not stated” means the feature is not described in FlowLister's public material; it may still exist. FlowLister'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 Draft
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.
Crosslisting, Not Just eBay
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
- Crosslist to 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
- Sell on eBay outside the US, in any of 10 country markets
- Track inventory, cost, profit and a tax report in the same tool
- Want a web app plus iOS and Android, with a free first scan and plans from $5/mo
FlowLister may be a good fit if you...
- Sell only on eBay and never crosspost
- Care most about the fastest possible draft with item specifics filled in
- Want a one-click publish through eBay's Trading API and nothing more
- Do not need inventory, profit tracking or a tax report in the same tool
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. For FlowLister, check their site for current pricing.
Frequently Asked Questions
How is Underpriced AI different from FlowLister?
Both turn photos into a priced, eBay-ready listing. As of September 2026, FlowLister produces an eBay draft in about 30 seconds with a sold-comp price and 20 plus item specifics, publishes in one click through eBay's Trading API, and does not crosspost. Underpriced AI shows you the sold comps behind the price, gives a calibrated range plus 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, and fills the listing form on 12 more marketplaces with a free browser extension. It also keeps inventory and profit, and runs on the web, iOS and Android.
Does Underpriced AI show the sold comps behind the price?
Yes. Every price is built from real eBay sold listings and you can look at the comps yourself. Around them 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 crosslist with Underpriced AI?
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, FlowLister states that it does not crosspost.
Does Underpriced AI publish straight to eBay too?
Yes. You review the listing and publish to eBay from inside the app, in any of 10 country markets, or to Bonanza. FlowLister publishes in one click through eBay's Trading API; both get you from photos to a live eBay listing without leaving the tool.
What does Underpriced AI cost compared to FlowLister?
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. For FlowLister, check their site for current pricing and platforms.
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