Dont forget gemm.com for the purchase of music. I am assuming source material is an audiophile item. This site may not always be the cheapest place to find the CD or LP you are looking for, but it will often list that one title you have been trying to find forever. And most of the time for dirt cheap. In fact, I find there is so much listed that it can take the fun out of "collecting" music, because it is all there. Amazon has been sitting in the corner wearing a dunce cap ever since I found it.
Good luck.
Chris
Good luck.
Chris