Welcome to FRF.
Some of the '06 Fagstaff/Rockwood trailers had delamination problems. It was caused by an improper glue applied between the Luan and Filon surfaces.
Do a thorough check of the sidewall before you buy. Look for bumps or any raised area, especially above the slide-out. If you do a search on these forums for " delamination
", you'll find some photos of this problem.
Also, you'll find that the trailer will weigh more than what the seller is telling you. The unloaded weight is a bit over 6000 Lbs.
I towed my previous trailer(8315SS), with my present vehicle(see signature), which weighed about 7000 Lbs. when loaded for camping.
Whatever you tow this trailer with, you'll need a good quality weight distribution hitch with built-in sway control.