Can't help you on the specifics of the Northland. I did look at a couple when searching last year.
Seem to be well made, not a luxurious if you will as the higher end brands.
In general when looking at used campers it's more about the amount of use its seen and how it was cared for and stored.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold