I bought a used 1999 John Deere S250 this spring and have put about 60 hours on it since I bought it. For a 12 year old machine this thing runs great and digs better than I hoped. It came with a Bradco backhoe attachment that has save a lot of time.
I've worked with other skid steer loaders before and I can say that the JD is as good as any of them. Other than 12 year old hoses wearing out, and routine maintenance I haven't had any issues with this thing at all.