Devil:

Another good option is the Dolan track bike. It's on probikekit.com for 650 shipped. It looks really nice and comes w/ a CF fork

Another good option is the Felt Tk3. I think those look like nice track bikes, again, a little cheaper than concept

Also, Spectrum makes aluminum track frames

You probably already know about these, but I just thought I would point out that they are 2 other good options. I would stay away from that ebay frame. Probably junk. If you are preparing on spending concept money, why would you even consider such a cheap frame?

Dolan and Tk3 are two bikes that are cheaper than concept but still really nice. Neither look as good, but they aren't ugly either. I think the Dolan is even pretty.