Should you grade an error card? Check what it is and the sold comps first

You are going through an old box and find a card with an all-white back, or the wrong player on the back, or ink that looks different from the copies next to it. The next thought is usually whether it is worth grading. Grading-fee break-even math cannot answer that yet, because it needs a sale price for a graded copy of your exact card. For an oddity, that price depends on two things worth checking first: what the oddity actually is (a known variation, an ordinary printing flaw, or something made outside the packs), and whether matching copies have actually sold. Flaws and blank backs can still carry a premium with some collectors, so these checks are not a test of whether the card has value, only of whether you have the evidence to price it. This article walks through both checks using the reader questions and answers on one hobby site, and ends with a case where the right answer is to leave the card unresolved.

Check one: is it a recognised variation, or something else?

Not every difference between two copies of a card is a variation collectors recognise. Some are ordinary differences within a single print run, and some are items that never came from packs in the normal way. The Junk Wax Gems page, read on 30 October 2026, shows several different answers to the question "what is this?".

• The same flaw on every copy. Asked about a 1990 Topps #336 Ken Griffey Jr card with a "green scab", Dylan replied on 31 July 2020 that "Every single copy in the entire print run (millions of the card) received the blemish on his arm." If every copy has it, it is not what makes your copy different.
• Ink-level differences. In the same exchange Dylan wrote "All are print varieties due to ink levels" and that the tone differences are "no different than every other ignored example of too much yellow, too much red, too much blue". A colour shift on its own may be exactly this.
• Ordinary printing flaws. On 27 November 2020 Dylan answered a reader about colour and stray-mark differences on a 1990 Fleer Ken Griffey Jr card,"Simple printing flaws. Not a huge premium and typically not considered part of the master set."
• Items that were never cards. On 22 April 2025 a reader asked whether Pro Set had issued mini cards. Dylan replied that "no cards were made": "The books that pro set issued in early 1992 included facsimiles of every card produced by then. They are just standard magazine paper reprints." The reader then shared the eBay listing that had prompted the question, which itself said "They are not for grading."
• An unconfirmed correction. A reader asked about a corrected version of the 1992 Pro Set #24A Nick Lowery card that the reader said Beckett listed. On 28 June 2020 Dylan replied: "There is a photoshopped corrected version on tradingcarddb.com - among many other unconfirmed/nonexistent variations." The exchange does not settle whether a printed correction exists, but it shows that an image in a database is not proof on its own.

A commenter using the name "always on the hunt" took a harder line on wrong backs on 2 December 2013: "wrong backs are dumpster divers gold or printing scrap and are not typically inserted into packs." That is one commenter's opinion, and the page has the other side too: in February 2013 a reader, Jack W., described a wrong-back Gretzky card bought from the person who opened the pack it came from. The page verifies neither account.

The practical test for check one: can you point to a source other than the seller of the card that treats the exact oddity as a known, distinct variation? A checklist or a price-guide entry for the specific card number is a start. Treat a single database entry as a lead to confirm, given the example above, not as confirmation.

Check two: do real completed sales exist?

Even a genuine variation tells you nothing about price until copies have sold. The Junk Wax Gems page opens with the warning "JUNKWAXGEMS IS NOT A PRICE GUIDE" and sends readers to the "completed listings" section of eBay for recently sold copies. For pricing a card, count only matching listings that actually sold: asking prices and active listings show what sellers hope for, not what buyers paid.

Read completed sales with suspicion, too. Of the Griffey card, Dylan wrote on 31 July 2020 that "there is no true range of sales for this card as most high dollar completed listings are not true sales and the result of market manipulation." That is one person's claim about one card, and this article cannot verify it, but it names a real trap: a completed listing can be a sale that was not what it looked like. Look for several sales, from different buyers and sellers, of copies that match yours in the specific way that matters.

1. Search the completed or sold listings for the exact card name, set, year and number, plus the specific oddity in plain words.
2. Record how many matching sales you find. One sale is thin evidence, and no matches leave the price unresolved.
3. Check that each sold item is the same variation as yours and not a different oddity on the same card.
4. Note whether the sales are raw or already graded, and keep observed graded-sale prices separate from any hypothetical value you type into a calculation.

A worked outcome: when the answer is not yet

Here is a case drawn from the page, with no prices on purpose. On 14 April 2026 a reader, Jeffrey Baffi, wrote that a 1990 Pro Set Joe Montana Super Bowl 19 MVP card turned up with a completely white back, "No text, nothing." The reader had searched eBay and found no listings of it. Dylan replied the same day with an assessment of blank backs:

• "most of them were not found in packs but rather retrieved from dumpsters in uncut sheet form"
• "Some blank backs were found in packs."
• "The card is not part of a master set due to the ambiguity of its origins."
• Montana collectors and some Pro Set master collectors "may pay a small premium for it but they almost never have universal appeal."

Apply the two checks as the owner of that card. Check one: Dylan identified it as a blank back, a known type of oddity, and put its exclusion from a master set down to uncertain origins; most such cards, in that assessment, did not come from packs, and the exchange does not establish how this particular copy entered the hobby. Check two: the reader found no listings in an April 2026 search. That does not prove no sales have ever happened; the exchange supplies no verified graded-copy sale price for a calculator, and Dylan offers only an opinion that some collectors may pay a small premium.

So the honest result for an owner thinking about grading costs is: do not pay to grade it yet. Whether to keep it or sell it raw is a separate question the exchange does not answer. Leave the grading decision unresolved. Keep it safe, write down what you checked and when, and set a date to look at completed sales again. If sales appear later, or a trusted source confirms the variation, you can restart. If they never do, you spent nothing on fees to learn that.

When the checks do pass

Suppose the oddity is a documented variation and you have found several completed sales of matching copies. Now the usual questions apply: what grade is realistic for your copy, what does that grade sell for in the comps, and what do fees, shipping and selling costs leave? The checker calculates outcomes from the sale values and grade probabilities you give it, and the cost calculator works out submission costs on their own. Neither knows whether your variation is real or your comps are genuine, so they are only as good as the evidence you bring.

Compare grading scenarios with your own sale values and grade probabilities in the free checker. Should I grade this card? checker.

To see what the fees alone will cost for one card or a batch, use the calculator. It does not know whether your variation is real. Free grading cost calculator.