>>15686New, you're lookin at $10-14k.
Holdover you can find $9-11k.
Used, latest chassis, $7-10k.
Used, older chassis ... anywhere from $1000 to $7000.
Bought my 900 with 300 miles on it, a little over a year old, for $5500-ish. Had some broken parts, but it was stuff I was going to upgrade/change anyways. Dude just never rode it.
Rode that for a few years, blew it up (con rod bearing let go, pic related) and parted it out, made about $3500 out of it so far and I've still got a crate full of parts in the garage.
Picked up my '12 in September for a little over 10k. Brand new, pulled it out of the crate, assembled, and loaded it into the trailer.