Want to pay off all your student loans, like, tomorrow? Then, get out there and find the elusive '74 blue Rodger Dodger. Good luck, though. This is easily one of the rarest Hot Wheels ever, as only seven of them were produced. Legend has it that all seven of them were sold off for relatively cheap back in 1985 after a young Hot Wheels collector named Bob Parker traded a bunch of his Matchbox cars to a collector from England for the limited-edition cars and then sold them through a mail-order business he started. But, they're just about impossible to find today.