Thanks for that link.  I checked it out, and most of the bikes were from overstock and I've seen them, but there were some that I hadn't on the other sites. 

The e-bike I really want is a Specialized Vado, which is a really slick set of wheels.  I don't think many traditional bicycle shops carry that model, and I'm guessing I'm going to have a very hard time trying to find a retailer selling Specialized bikes and who takes bitcoin.  But I can wait.  I'm still saving up, and these bikes aren't exactly cheap.  I've owned cars that cost less than what some e-bikes are going for.