Buy it buy it buy it buy it buy it buy it!
They are a great little tractor, parts are ( thank to people like old20 company and agriline ) easy to come by. If it's had a fore end loader on it, when you go to look at it ( and if the seller doesn't mind ) jack up the front, but not by the axle and look for any vertical movement in the axle and axle pin.
If you want to drive anything from the PTO, then you'll either need an adaptor ( if it's only going to do light work ) to take it from 1 1/8" to 1 3/8" drive, or for heavier work you can buy a new PTO output shaft and either fit it yourself, or have it fitted.
Other tractors to consider are David Brown 880 or 990, Nuffield Universal, Fordson Dexta and International 414. There are others that I can't think of right now, but someone else will be along shortly!