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How to Get Emailed When a Card Lists Under Its Sold Comps

Setting up a Deal Radar watch, and what it refuses on your behalf

By Wildcard Editorial • September 15, 2026

Name the card exactly, confirm your address once, and the daily scan emails you only when a listing prices under the card’s completed-sales fair value. Here is what to type, what you get, and what the scan throws out.

What you are setting up

A watch on one card. Once a day, Wildcard pulls the new listings for it, builds a fair value from recent completed sales, throws out everything that is not that card, and emails you only if a listing is priced under that fair value. If nothing is, you get nothing. That silence is the feature: an alert that fires every day is a search, not a signal.

Step 1: name the card exactly

Year, set, player, card number. 1986 Fleer Michael Jordan #57, not Jordan rookie. The scan can only refuse what it can tell apart, and the card number is what separates the #57 from the sticker #8 and the base card from the Scoring Leaders insert. If the card has a grade you care about, add it: 1985 O-Pee-Chee Mario Lemieux #9 PSA 8.

What not to type: a player name alone, a set alone, or a category like “Curry rookie autos.” Those match a pile of different cards, and a pile has no single fair value.

Step 2: give it an address

No account. You will get one email with a confirmation link, and nothing else until you click it. The link is signed to that one watch and that one address, so it cannot arm anything else, and if you did not ask for it, ignoring it means nothing happens.

Step 3: read the alert when it comes

Each row shows the listing, its price, and the line that matters: 31% under $1,993 fair value. The fair value is the number the listing was measured against, from completed sales, not from other sellers’ asks. Rows marked Wildcard are 40% or more under. Every listing link goes straight to eBay.

What the scan refuses on your behalf

  • Not one card: lots, complete sets, empty boxes, unopened packs, pick-your-card listings.
  • Not a real card: reprints, customs, novelties, facsimiles, proxies.
  • Not this card: a listing carrying a different card number than the one you named.
  • Not a believable price: anything more than 95% under, and anything under $5.
  • Not a trustworthy comp: a watch whose completed sales are too few or too scattered is paused, and the reason is logged, rather than allowed to alert on a number nobody should act on.

Why it is daily

Because the judgment is the product. Pricing every new listing against completed sales is the work, and once a day is the cadence that work runs at. Instant delivery by push and Discord is the part Pro adds; the daily email stays free, for three watched cards per address.

When it goes quiet

Most of the time that means the card is fairly priced everywhere it is listed, which is the normal state of a liquid card. Sometimes it means the comps got thin. Either way, quiet is the honest answer. If you want to check the watch is alive, the confirmation page told you it was armed, and every alert carries a one-click unsubscribe, so you are never guessing what is running.

Try it

The form below is the same one that is on every card page. Name the card, confirm the address, and let it run.

Set up a watch right here

eBay tells you a listing exists. Wildcard tells you it is underpriced.

Type the card, confirm your address once, and the daily scan emails you when a listing prices under real completed sales — with the fair value it was measured against. Free, no account.

One confirmation link, then at most one email a day, and only when a listing is under comps. Unsubscribe in one click from any alert. See what an alert looks like →

Explore deals in the app → Browse boxes by sport →