Are bootlegs common for the Vita? I only ever got one used game before and suffered a sticker swap debacle(some jerk managed to perfectly transfer a P4Golden sticker onto a cart for Lego HP). Luckily I easily got the item replaced since I bought it from Gamestop, but something I want isn't available locally anywhere and may need to take to ebay. I tried googling, but couldn't find a good guide to buying used Vita games. I saw some allusion to bootlegs, but nothing terribly solid. I really want to expand my collection. Thanks for any replies.
TLDR: Are bootlegs an issue and is there a way to identify them? Also are sticker swaps a common problem?