I just went and checked out a 710 backhoe (2wd) with 4400 hours. It has no major leaks, and is about 50 percent worn bushings and pins. What's a good price for a B series 710?
Very had to put a number on the value of a machine sight unseen imo, might wan't to have a good mechanic check it out for you. We could 'armchair guess" all day long and not help you with a specific machine. I think the maintenance and care given to a machine is more important than the hours even if one has 4000 and the other has 8000 on the clock. Good luck finding a good machine and psts pics of what you get.