Great quad! I own an '05 model, the only difference is they had res. shocks in '05. One thing to look for is they had an issue with the clutch/water pump side cover. The magnesium would react with the coolant and start corroding. Check the oil to check for any contamination, if looks good, you should be ok. Change the coolant anyways though. Sounds like a steal for $900. They do respond well to mods too. Last spring I installed a 440 kit, hot cams, airbox mod, full exhaust and a DRZ rev box for just a little more rpm. I can run with and beat most 450's with pipe only mods. I'd jump on the deal. My quads my up north dune riding machine, most of the time you'll find me on my trikes
'74 ATC70 (stock for my nieces)
'84 ATC70 big carb, race cam, and piped (big boys little toy)
'84 ATC125M
'85 ATC125M
'85 ATC185S (200X carb and pipe)
'83 ATC200X (my first trike ever, avatar pic)
'85 ATC200x
'85.5 Tri-Z 250
'85 ATC250R
'79 CJ7 w/351 Cleveland
'77 XL75, '78 XL125
'88 Katana 1100
'00 King quad
'05 LTZ400