I work part time at Gamestop, and sometimes it feels like there's a full 1/4 inch of price stickers on some of our games. We're supposed to peel the old ones off when we put new ones on, but sometimes there's just not enough time, especially on weeks when it seems like we're repricing the whole store.
In response to the topic, I love finding original price stickers, especially from defunct businesses. I'm over 40, so I remember all of the places that used to sell games, and I enjoy the nostalgia factor.
What I really HATE however, are game stores that put the price stickers right on the cartridge label. Some come off easily, but there's nothing worse than damaging a cart label trying to get a sticker off, or having sticky residue left behind.