Yup they are getting expensive, well relatively expensive (they're still hella cheap).
Like Zack said i just dropped close to grand for 5 projects and a parts bike, and I was fine with it. I definitely didn't get a great deal but the I also didn't rip off the old guy that was selling them. Sadly I won't be making anything on them either as it seems all my friends want a Minarelli.
I know I won't be selling anything running for less then $400 from now on; mint bike are going for twice that and going as fast as I can get them running; so $200 for a project doesn't seem that out of line.
It's a good time to know about mopeds that's for sure.