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This stuff is in good shape, I've only had a dirt bike for about 2 of the last 10 years. It's probably 7 years old, but only saw maybe a dozen days in the dirt.
As far as sizing goes - I'd say I'm of average, wear a Vanson 46 suit.
Moose chest / back protector - comes with Camelbak classic zip tied to the back, add your own bladder. $40 (size large)
Fox kidney belt - $10 (for 32-38 waist)
Fox elbow guards (hard plastic outer) - $10
More to come - I'm cleaning house!