I know this is an older thread, but I just bought a 2006 990 with 310 hours. I have only used it to mow about 5 acres of severely overgrown fields, but it did great. Broke one shear pin by trying to go over a clump of bushes and another hitting a log that was covered in weeds. Ran it in range "A" 3rd gear at 2600 for 5 hours or so and didn't even burn a 1/4 tank of fuel. I like how the PTO can be engaged slowly at low RPM and gradually ramped up to operating speed. I still have to get used to the idea of just pushing the clutch in just a little to shift gears. I also have to remember to put the tractor in the gear I want to mow in because the tranny does not liked to be shifted when the engine is turning 2600 RPM! I end up coming off the throttle to about 1200 and then going back up to PTO rated RPM. I bought the tractor with 310 hours, a 300CX loader, a seperate grapple bucket, a 5 ft cutter, box blade, ROPS shade, and an 8B backhoe. It needed basic maintenance (engine oil very black and thick, airfilter brown, gas filter awful.) All the filters were bought from the Deere store and I thought were quite reasonable in price. I was expecting a hosing but it didn't happen. I had the same trouble getting the ring off the fuel bowl that others have had, but got it with lockjaw pliers I bought to remove oil filters. Worked like a charm. The only issue I have with the tractor is that the headlightcover is broke on the right side. Deere says I have to replace the whole front as a unit for $180. Anyone know of a 990 being used for parts?