Another quick story: At GameStop, to receive the 30% bonus you had to purchase any used item. I did so by buying a first generation iPod nano. It worked but was fairly beat up and was cheap.
Low and behold it qualified under Apple's replacement guarantee (something to do with a bad battery, back in the day). Apple sent me a box/label/postpaid with a couple of days and within a week I had a brand new, current iPod!
Not too shabby for $18.