Those are pretty cool but for that money you can get something like this.

http://cgi.ebay.com/ebaymotors/pop-u...32898231QQrdZ1

I know some one that picked up one of those for $750 locally. With barely any more work, it was in great condition. I took it on a little camp trip and it was perfect for two people. Four would be tight. The only down side is having to tow something around.