Most I've ever seen on one when I was looking was around 2200ish I believe. I searched hi and low on the tractor forums, and I think if you get over 3000 on a 790, you're doing very well.
I got the tractor, 5' bushhog, 5' tiller, 5' finishing mower for $8500. it is a 2004 tractor with 350 hours. I assumed it was a decent deal but was not sure how many hours to expect.
Sounds like a good deal to me...especially with the implements. The 790 I referenced above that had 2200ish hours on it had a loader and a 4 or 5 ft bushhog and the guy was asking 6500. Sold it in about a week or so.
I know yours doesn't have the loader, but way way less hours and the tiller is worth a fair amount too. I think you'll be pleased