The worst truck I've seen for value are the old Mazdas and Toyotas. I have a friend who looked up the value on his '84 Mazda 1.9L 4cyl. and it came up as No Value Available. He looked up his uncle's '85 Toyota 4x2 and it came up with a retail value of $425, and a trade in value of $25. Lucky for him he also has a '96 F-150 with a 300/6-5 spd.