I purchased my 231 in 1999 because it was a lot of bang for the buck when compared to other tractors on the market at that time. Not as many refinements as the compact tractors of similar age but a lot more tractor for the money. It is used for mostly property maintenance now, bush hogging, mowing, tilling and some sickle bar mowing. I have also done a fair amount of grading with it.
I love it and it’s been a reliable tractor. I’d buy another one without hesitation. The Perkins engine starts easy and runs well. Plenty of power, it easily handles the 6’ tiller in heavy sod. The power steering turns easier than a car.
Only one cautionary note, if you are planning to put a loader on it, you will need the auxiliary hydraulic pump. The pumps are kind of pricey which might make you consider buying a tractor that already has a loader and sufficient hydraulic capacity. Other than that I wouldn’t hesitate to purchase a well maintained 231.