Apparently there's not much demand for the 12-foot guitar in the desert (see the Big Sound post below). It didn't draw a single bid in its eBay auction. The $1,000 shipping charge must have scared off people.

Anyway, that one pales to this 32-foot, 2.25-ton electric guitar that was made for the Discovery Channel in 2004. It had a real made-to-scale pickup and a half-ton amp. It took two people to play it -- one to pluck the strings and another to operate what amounted to a giant slide on the fretboard.