Skip to content
Underpriced AIUnderpriced AI

Selling and listing

Mark an item sold and track profit

Record what you paid, record what it sold for, and see costs, fees, net profit and ROI on every item you flip.

Financial tracking is available on all plans. Record two sets of numbers, the buy and the sale, and Underpriced AI does the math on each item page.

Record what you paid

When you create or edit an item, fill in:

  • Purchase Price: what you paid for the item
  • Source Location: where you found it, such as a thrift store or estate sale
  • Shipping Cost (Inbound): what it cost to get the item to you, if it was shipped

Source Location is what feeds sourcing ROI reporting later, so it is worth typing in even when the purchase price is a dollar.

Mark it sold

  1. Open the item you sold.
  2. Record the sale details: Sale Price, Platform (eBay, Bonanza and so on), and Shipping Cost (Outbound).
  3. Save. Platform fees are applied automatically for eBay, Poshmark, Mercari and Facebook Marketplace, and you can enter fees manually for anywhere else.

If you listed the item to eBay through Underpriced AI, you can skip this step. eBay auto-sync pulls the actual sale price, real marketplace fees and shipping charges when the order comes through, marks the item SOLD, and updates your profit. Auto-sync never overwrites sale data you entered by hand.

See profit and ROI

Each item page shows a breakdown of your costs, the platform fees, and your net profit. ROI is calculated as (Profit / Total Cost) x 100, so a $5 item that nets $25 profit shows a 500 percent return.

Keep the numbers usable

Accurate purchase prices and sale prices are what make the rest of the app honest. They drive the Death Pile priority score, the analytics reports on the Business plan, and the Schedule C ready Tax Report CSV. If you sold something outside the app, enter the sale price and fees manually so the totals still add up at tax time.

Sold items you no longer want in the main list can be archived, individually or in bulk on Pro Plus and Business plans.

Frequently asked questions

Do I need a paid plan to track profit?
No. Financial tracking is available on all plans. You can record purchase price, source location, inbound and outbound shipping, sale price and platform on every item, and each item page shows your costs, fees, net profit and ROI.
Will eBay auto-sync overwrite sale details I typed in myself?
No. Manual entries are always preserved. Auto-sync fills in the sale price, real eBay fees, shipping charges and order date for items you listed to eBay through Underpriced AI, but it will not replace numbers you entered by hand.
How is ROI calculated?
ROI is (Profit / Total Cost) x 100. Total cost includes your purchase price and inbound shipping, and profit is what is left after outbound shipping and platform fees. The breakdown appears on each item page once you have recorded the sale.

Try it on web or mobile

Your first scan is free, no card. Plans start at $5 a month and packs at $4 for 5 scans.

Updated 2026-09-05. Something wrong or missing? Tell us and we fix the guide, not just the reply.