Here’s a tip for those buying used LP’s (or CD’s, for that matter) which have a price sticker attached directly to the album cover, which when removed leaves behind that nasty, sticky glue residue:
I years ago discovered at Michael’s Art Supply a product named Bestine, a solvent designed "for thinning or reducing rubber cement", as it says on the label of the can. It is the best thing I’ve found for totally removing price sticker glue residue, and doing so without damaging the cover or leaving behind a gooey mess, unlike Goo Gone.
Bestine is available in 16oz and 32oz cans, but is somewhat hard to find locally. Michaels no longer carries it, but you can get it on Amazon. $21.99 for the 16oz can, which will last you a LONG time. 16oz is enough for hundreds of stickers.