That was my first atc I ever owned after years of dirt bikes, well mine was an '82 and not much different.
I remember when I bought mine back then and it was as close to new as you could find and I paid $750 for it with a pipe and an aftermarket wider axle, and the stock parts. Don't you wish prices were like that nowadays for a like new machine?
I can't really put a price on it myself, but look around on ebay and other classified type things to give you a ballpark idea?
Their is a few guys who still have high performance atc's on here that may have an idea too.
The history of that machine is great though because it was the first high performance atv, and started it all back then. It would make a cool project machine for someone too, as it looks to be a fine machine to restore back to new...Good luck with your sale if you decide.
05 Suzuki DR650, Mikuni TM40 flatslide pumper carb,JE 10.5:1 piston,stage 2#190 Webcam,open airbox, Twin Air,full FMF system,Pingel fuel valve,Ricor Racing rear shock, Ricor Racing fork Intiminators, Progressive springs, Sargeant seat,DRZ250 tailight,custom plate,LED's,GPS,sumo fender,PT bars,Cycra brushguards IMS lowered pegs, aluminum skid,bearing chain roller,Pirelli,tank bag(gone)
06 Zuk KQ700, Kenda Bearclaw HTR radials Warn RT25 w/ syn. line, 1.5mm clutch shims