Original 575 design, with aluminum frame & swingarm. This one has had a hard life, but most of the major components have been replaced.
It looks a little rough, but rides fine and rips with the bigger suspension.

Shock is a DHX Air, which is more Enduro/big-hit oriented. Forks are super-cool Bionicon triple crown--they weigh about 4# but have 6" of travel which is infinitely adjustable via the button on the bar. It could use some shock bearings.

X0 rear derailler (9 speed, baby), XT front, X9 front shifter, X7 rear, Magura Marta brakes, no pedals but could probably negotiate a set of SPDs into the deal if you need some

$700 located in Carson City, NV (near S. Tahoe)