I saw this ad on craig's list.
http://sfbay.craigslist.org/sby/art/585865070.html
Your best deal is finding a used one.
But from what I read they can be hard to find.
Nonetheless Potter's Web.Net has a listing.
http://www.pottersweb.net/index.php?ad&cat=wheel
Shipping is going be expensive I bet.
If there's a place near where you live
that sells pottery supplies they may
know a pottery group that might have
local listings of used equipment for sale.