Value of this PX10?
 

I don't know what year this bike is but there are some pretty good photos:
http://www.craigslist.org/nby/bik/39450869.html
Also what kind of bottom bracket would a frame like this need?

Late sixties, possibly as early as 1967 (first year for white paint, except for team bikes, which were white earlier).
This bike will require a French threaded bottom bracket. Frankly, either get the original stronglight or get a phil wood bb. Bike is too nice for any of the other BB treatments I'd give a French frame.
Looks in very nice shape. Seems a bit pricey, but the big city market is like that (where is this bike at? SF?).
To give you some idea of pricing, I paid 455$, including shipping, for a complete PX in excellent condition from the same period (same size, as well). I'd try to talk the price down a bit.
Bike will require a Simplex rear derailleur as the dropout is simplex; unless it has been tapped out to take Campy/Shimano stuff.

I emailed the guy, he deleted the original posting so I got depressed thinking it was sold, then I saw a new posting with a lower price (220), whoo hooo! I'm so happy, it's damn hard to find a bike like that in a large size. I'll probably build it up brakeless fixed inititially with as much chrome as possible, I'll post pics when it's done, thanks for the advice.

They make excellent fixies. Have fun. Never had much trouble finding bikes in this size, though.