I primarily buy them for my collection. I've been able to find a few LPs on eBay, still in original shrink wrapping dating from the 60's-80's for under $5 in some cases, I don't play them, the only ones I play (rarely) are ones dating from the same era, primarily used for promotion use only (VG condition). So, check eBay, and if you want to transfer some of your vinyl to Mp3, get yourself something similar to this.
http://www.propeller.com/viewstory/2007/08/05/usb-lp-to-mp3-converter/?url=http%3A%2F%2Fgadgetlink2.com%2Flp-to-mp3-converter.html&frame=true

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.