I am going to look at a used mid-1990's Mustang 940 for sale (asking $8500). Are these overall good machines and relatively easy to work on? Are the parts still available? What should I look for specifically when checking out a used unit? I am mechanically inclined but fairly new to skid steers (I worked in almost every area of Engineering at Hyster over a 12 year career there). I currently have an old 1971 Bobcat M600 but am looking for better performance. Thanks and regards, Michael