I have a 580C, really nice digging machine. Nice to be able to punch a 10' x 10' x 10' hole in about 10 minutes, then make stuff disappear. Or bury a 250-gallon plastic chemical tank next to the shop with 20' of drain for a <$300 septic system. If you pick it up, make sure you don't get a trailer or you're going to start getting calls like, "Hey buddy, can you help me out?". Ask me how I know. . .
Bruce