When it comes to mini's, they all make a pretty good machine. Deere, yanmar, bobcat, kubota, cat, new holland, volvo, etc etc.
AS far as a used one, it all depends on how it was cared for. I have seen 2000hr machines that look and run like new, and I have seen 2000hr machines that are totally wore out. All good advise as far as checking the overall sloppyness of the machine and everything that moves.
And I know alot of people have the notion to avoid ex-rental equipment, but overall I found when I was shopping that they seemed to be in better condition for similar hours. Because they get rented a day or so at a time...then get a going through. They get greased ALOT and follow proper maintenance schedules. At least good rental companies. They tend to stay on top of keeping them in tip top shape. Because no one wants to rent a piece of equipment that has issues