Agreeing with Aubree and Denise. I buy both used and new. I don't buy anything used unless it is close to half of the new price. When I sell, I list things at 1/2 of the new price. Why would I buy something used for $17.00 when I can get is brand new with a guarantee for $20.00?
ETA -- IMO, it is better to get back half of your money. Something is better than nothing.