On eBay, a very rare Mac "bug," (original listing is, naturally, gone) an inexpensive (at the time) semiautomatic key for the beginning -- or impoverished -- amateur.
Discontinued soon after it was introduced, the key was made mostly of stamped sheet metal, like a heavy toy. Though it was built to sell at a low price (thank you, Ted McElroy!), scarcity means they're now sought-after collector's items. The present example? "Reserve not met," at over US$500.00 bid. Have a look, it's an interesting artifact.