http://www.amazon.com/Lenovo-ThinkPad-T61-7658-Notebook/dp/B000UDISEW/ref=sr_1_1?ie=UTF8&qid=1369837068&sr=8-1&keywords=t61
I used an R61 in college with vista, s2008 and w7 before i sold it damn thing took a hell of a beating and the t's are supposed to be tougher, a 2gb memory module wouldnt hurt it but won't be too expensive if you think you'll need more than one gig of ram
My recommendation is to grab an old Dell or HP off ebay. Or a refurb unit from Newegg: http://www.newegg.com/Product/Product.aspx?Item=N82E16834230808
There are all kinds of laptops/nettops for <$200 that would fit your bill.
I was given an R500 because the person corrupted the Windows install and couldn't get it to work. I unlocked the bios with a pair of tweezers, installed a new OS, and it is running as we speak.