This has been offered to me for $4k. It starts up and runs beautifully, has the Ford 200 straight 6 and C4 trans, seems to shift okay but could not test drive it because the tracks are frozen to the ground, the hydraulics seem to work also. The tracks look very good, the sprockets look excellent. It was used by the state to groom cross country ski trails before it was declared surplus and shows 2500 hrs on the hour meter. There is some rust, but not bad and looks to have been stored inside mostly. Have looked around online and seen similar machines listed from $3k to $25k and have no experience with them. They have always fascinated me and I am strongly leaning towards making the jump and purchasing it, just curious if there is anything I need to look at which could be a deal killer.