In keeping with the retail theme, always check for price tags. Sometimes a store may not have a game labeled, due to it being so low or someone simply overlooking the title. Back when Circuit City had stores, I picked up a copy of Incredible Hulk: Ultimate Destruction with a price of $20 and a copy of Beyond Good & Evil which was missing a price tag. I had money to spare, so I went to the checkout. My total?
$23! BG&E was only $2!!!
If a game piques your interest, but has no price tag, do not be deterred. You may just be onto a monster deal!