I've never seen one on there myself, personally.
I got mine on ebay in an auction, but that was luck.
The two that I see on ebay right now are around $200,
correct if I'm wrong, but I think those are the only ones you can get that will ship to the US,
unless you want to use a shopping service to buy one in another country.
In fact, I think there was a thread a little bit ago about Harrods in London selling english IDLs, but I dunno if they sell their stuff online.