What do you class as "cheap"?
It's an in-demand device so you're not going to pick one up for buttons.
From 2 minutes browsing, this:
http://looksmartpro.com/product_info...ducts_id/10600
... was the cheapest that turned up. No idea how much they'd sting you for shipping and if you also got hit with import tax, that would be your bargain out the window.
In the UK, the cheapest website that turned up was a sniff over £200.
http://froogle.ibitstore.com/index.p...itstore.com%2F
Never heard of the site so no idea if they're any good or not.
Only other thing I can think of is to keep an eye on the refurb section on the Apple Store site. Can't see too many turning up in that section and they won't be there long when they do ....