T213-2 Coupons are almost always kept from higher grades due to light creases(cracks) which are a result of the cards being manufactured with some kind of lacquer coating to the front that would become damaged during the production process. Or so I have been told.
I like to collect the ones that look minty with strong corners that grade very good because of a crease. Other collectors may prefer those few cards that are not cracked but have a weaker eye appeal.
My Cobb has a 1/4 inch crack upper right near the border. It is really hard to capture the flaw even with a larger scan. Since I keep all of my cards at the bank, and only look at my collection on my ImageEvent website, the creases do not bother me as much.

