With a mower, and new tires, I can't see how on earth you're over priced. I'd guess you have that or more in it. Also look at ads: 615155, 614951. Your not priced too differently in my mind.
The rear tires alone are $660 without tubes. Tubes are $80. Locally a starter costs $100 to get rebuilt.
It's biggest flaw is that it doesn't have 3pt, and over here in Az, any thing without 3pt dose take a hit in comparison to the value of 3pt equipped.