At least take the sticker off....
 

I mean it's ok to charge more but at least take 3 seconds to peel the lower price off...

http://www.ebay.com/itm/1948-Charles...item258fcf2996



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My guess is that leaving the sticker on is supposed to demonstrate the appreciation in value that the next buyer will receive. Right.

I would guess if the seller bought the card for the $15 price tag that after free shipping and ebay fees they should be charging more that $20.

or its covering up a bad corner.

I would be okay with it. 25% is a small mark-up. It should be assumed that a seller is selling to make a profit.