Oh I think $8K should give a person a pause to think about, sounds like might be a deal. But thinking your gonna get 8000 hours on those little Yanmar diesels is mabe stretching it. I love that engine but not the same as the old cast iron blocks in real utility tractors. It runs higher RPM to get the full PTO speed of 2800 also.
The three point link might just have been lost and needed to be replaced. Or something got whacked hard and you better look at the castings and frame back there.....An inspection would let you know but pictures ain't gonna telll the story.