Yeah, I agree. Mine was $8 plus shipping from an online thrift store. That 'cult classic' label can really jack up the price.
I see one on Shopgoodwill.com right now for $8.99 and it has one bid on it with four days to go. It's mislabeled, which is probably why it's so cheap.
I haven't seen one at a thrift store for some time, but people seem to find them from time to time. That might be a good place to look, just to see if one pops up sometime.