Yeah I agree, THOUGH. Sometimes Isopropyl Alcohol can help get the sticker residue off. (Just make sure to remove the inserts first) Hairdyers have been suggested before, but they warp the plastic and the inserts.
When I buy on E-Bay I always ask if there are any stickers, sticker residue, or any marks on the item (got one SEGA-CD game with $29.99 on the cover). I was burned once, I bidding on Taillight Princess for the GameCube, at least I think was the name of the Zelda game I was bidding on. The bidding got pretty high for just a disc, no box or manual, needless to say I won the auction. But when the game got to me, the disk had sticker residue all over the top of the disc. It was a totally mess, if you want I can take a pic of it. Anyways I the seller I was not happy, it was so bad there's no way that disc is going to go in my machine. The sell made up for it though, gave me a full refund and told me to keep the game. So now I just ask a head of time before I bid on any games. :/
It's a mess alright, sometimes I try to get the glue and sticker leftovers off Saturn cases by disassembling them and scrubbing it with a sponge but you have to be extra careful since that CD-case plastic cracks way too easily if you apply even a little pressure to it. Now, cardboard cases? well you are fucking SOL.
Personally I've found lighter fluid works amazingly well to remove the residue without touching the paper/cardboard.
Thanks, a hair dryer to remove the sticker and lighter fluid to remove the residue works great! I first tried it on a cheap game and it worked so well that I've spent the whole afternoon removing stickers from my SNES and GB/GBC boxes. Not a sticker left and everything came off perfectly, no residue or damage at all. On two boxes there is some slight discolouration where the stickers were, but considering those stickers were almost 20 years old it is still a very good result.
Not all stickers can be removed with a hairdryer or other helpful appliances. Some price tags used the nasty kind of glue and even if you remove it, then the acid or whatever will have damaged the cardboard, i.e. melted into the color, dampened the color, melted into one with the top layer of the cardboard... some crap like that. And even if it goes of flawlessly, then maybe you'll realize that the entire box is a little bit sunbleached when the spot where the price tag used to be seems to be a little highlighted. Anyway, I don't know why gaming stores do it. The only explanation is that they are managed by retarded ignorant fucks. Imagine a vintage book store would just write prices in edding on their 19th century books?? WTF? Obviously it'll take some time until people realize that they're dealing with artifacts and collectibles and not bean cans and rice bags. In Japan this is unthinkable. In pretty much every used items store, let it be comics, books, vinyl, cd's or video games, everything is neatly wrapped in plastic foil prior to sale. Price stickers are the same as everywhere else in the world, but they are just on the outer plastic wrap - never in direct contact with the game, or even the game's original seal (if it's still factory sealed)!