What is your deal breaker?

[bnorth]

I don't mind creases, paper loss, or hole punches unless they are on the players face. I actually like the anything but round hole punched cards.

[Econteachert205]

I can't deal with trimmed cards. All I see is dishonesty when I look at them.

[lug-nut]

when i'm offered a $300 card for my $1200 card as an even trade

[TexasLeaguer]

High grade PSA cards. Too many people focused on the registry, too many altered cards, grades are too subjective and inconsistent.

[slipk1068]

I don't like dirty T206's. That and trimmed cards in high grade holders.

[egbeachley]

Sellers who use the word "rare" in their listings when it's not. I would rather it sell for 1/2 what I am willing to pay than to raise the price one increment.

[the 'stache]

It's hard to say, because I think it comes down to the individual card. I haven't gone after anything super rare or expensive--yet--so, I haven't had to worry. But trimming would be one. Writing (as opposed to a pencil mark) would probably be another. I can't buy a card with corners clipped, which is too bad, because there were a lot of really otherwise beautiful T206 cards up for sale recently with clipped corners. I saw them, and I nearly cried. I know they were probably scrapbooked, but I just feel they probably could have been removed without cutting the corners off. I could be wrong.

Anything where a card has been restore to deceive, I couldn't buy that card, either. Paper loss is usually a killer for me, too.

Of course, if it were a really rare card, who's to say?