I'll buy throw pilows and clothing used at the Thrift Store, DVDs as they're only $.50/ea. Throw pillows as I plan to recover them and they're cheaper than buying a brand new pillow form only to cover it up anyway. Clothing because I'm trying to lose weight so might not be wearing it long but I check for the brand and shape it's in. My sister buys used silk flowers and flower vases from the thrift store too.
I've also bought used power tools if I know the person I'm buying from.