In addition to the bells, Arcosanti sells books. Most of them deal with the more esoteric elements of architecture, landscape architecture and design - meaning they're big, beautiful, and expensive. They also have some good books describing various communal living concepts and manifestos, including, of course, Paolo Soleri's theory of 'Arcology.' Not a whole lot for the lay-person, but certainly lots of intellectually engaging and challenging material.
Arcosanti's main (okay only) source of income is the bells. And, I must say, they are pretty cool. Most are cast in bronze, and no two are alike. They aren't cheap, but I'd say, for a hand-crafted piece of art that supports a non-profit enterprise, they're pretty reasonable. As part of the tour, you get to see the foundry where the bells are made, and, if you're lucky, see someone actually doing it.
Most of them are about 6-9" not including the clapper and any extraneous art hanging from it. The shapes are pretty wild, but in a very harmonious way. Let me tell you that I wouldn't mind getting one of these for a gift (my birthday's in May : ))! They will gladly ship them for you anywhere you want.