Of course, condition/quality is important but:
"What are some of the main things to look for when buying used?
We are trying to stay under 60k with this purchase."
Generally, smaller amenities can be economically changed to suit you. IMO, the most important things to consider are the things that aren't easily changed.
Gas or Diesel? Length? Storage? GVWR? Towing capacity? Ride quality? Number of people usually using the motor home at one time?
Floor Plan: Does it work for you? Do you want slides? Be sure what you will be using the vehicle for. Boondocking or full hook up campgrounds? Extended stay/travel or short term use?
Options: Jacks? Multiple A/C units? Generator size/System size: 30 or 50 amp? Refrigerator: Gas or Electric? Washer/dryer?
When you make a mistake on the big ticket items, generally you'll have to start over with another motor home. That will cost you . . . . big time.
Go to a few RV shows and look to see what's out there. Then be clear on what you want versus what you really need. Remember, this is an RV, not a house. Take your time. In your price range, being a used RV buyer, generally you have the upper hand. What you want is out there. It may take some time, but it's out there.
Chum lee