That is in the ballpark of what I would expect. The used Grizzley's drop like a rock in value, just like the big Kaws, Zuki's, etc. Not that they are bad, it is just that so many are purchased by people that think they are going to go cut a ripping swath through the toolies then find out that they are too big for much of anything outside of conservative riding on wide trails, are useless without a winch, are heavy and get lousy fuel mileage, and like to tip over on side hills. Then along comes the first kid with a sport ATV and blows them away - end of love affair, and they go up for sale.
Just be sure it is a real sale, and not one of those "broker" deals where some scam artist is claiming to be out of the country in a new job, and having some third party handle the sale.
If you are looking for a toy I would go down to a 400 or so cc rig that still can get decent fuel economy and not work you to death. If you are looking for a workhorse, then you are on the right track, or could step up to a Mule and do it in comfort.