You could also get an x200 via Ebay or a t400 from overstock or something. If you check the seller reviews you'll probably end up well, and you could spell less than $200, then you could also upgrade the ram and hard drive yourself, which isn't hard. The process for installing libreboot seemed complicated though, and I figured I was happy enough to want to support Minifree and Libreboot's development. I've been happy with that decision so far.

Good luck! :)