I'm slowly listing my whole vinyl collection for sale on discogs.com. If you're into your house, trance, hard house or progressive from 1990-ish to 2006-ish, please take a look here.
There's 40-something vinyls up for sale at the moment, and more will be added over the next week (the plan is to have all 1,000+ vinyls online by the end of the month - scary...).
Another shameless plug: I've also knocked together a "stuff for sale" page which I'll update with new randoms as I put them up for sale. Go on, take a look - you know you want to... :o)