Just bumped into this.
REDUCED CycleOps PowerTap SL with Fugi Finest Al | eBay $200
As far as I can tell, it needs the head unit for the Powertap, probably $50 to $100 or so.
Not the greatest power meter.
Not the greatest of bikes.
But put them together, and it is hard to beat $200.
All you have to do is pick the bike up in Seminole, Florida.
I tried to send a note to the seller asking about shipping, but no response.