Hardinge had an unfortunate flirtation with the AB8200 control on the Superslant model. It was a quality control nightmare, hence the reputation. Superslants suffer from the same problems any DC drive machine has, namely brush dust and oil contamination. The machines with GN6 (Fanuc 6) controls are decent machines if kept maintained and run regularly. Don't let them sit for weeks and then expect to fire up and go. The spindle cartridges usually run for many years and can be rebuilt. Hardinge has high repair cost since these machines are well past their prime. The control and drive boards can be repaired at a reasonable cost, depending on where you send them. What type of barfeed is it, the air feeder w/black tube? Resale is generally in the 5-20K range but with a bad spindle you'll have to give it away. Good luck!