Originally posted by blueeyedboy:[..]
There's a great app called The Vinyl District you can download free. It will give you a list of any stores in your region, or if you're travelling, within proximity of where you are visiting.
Otherwise discogs.com or musicstack.com are usually good on-line sources. Know the value of what you are buying though - some cats will try to rob you blind on their valuation. (and sadly, most of the gougers are here in the States)