Looking for advice/feedback on a purchase

Are you looking at used rentals? A 2015 with over 100k miles sounds like a rental unit. 80-100k miles is a lot for an rv let alone a gasser.

When looking at used units condition is always more important than brand, but all things equal I would put Thor at the bottom of the list. Thor owners don't get ruffled, I've owned 2 Thor gassers. Enjoyed them both, but you get what you pay for in terms of quality.

When looking at RV's your first priority should be floorplan. Figure out what type of floorplan is going to work for your needs. Envision driving, life while driving, and every aspect of daily life in the rv, moving and not moving.

Dusty R wrote:
We are on out 3rd new mh 2nd Winnebago/Itasca. I've felt that Winnebagos are better built.

I agree. I'd rather have a Winnebago that's 3 - 5 years older than a slightly newer Thor product. Do your due diligence.

There are two types of RV. Those that have leaked and those that are going to leak

We are on out 3rd new mh 2nd Winnebago/Itasca. I've felt that Winnebagos are better built.

And then if you like the life style within several years of experience you'll be ready for the next RV.

Generally speaking most RVs are sold based on the inside looks/layout. Give serious consideration to access with the slides (if any) in - bed, bathroom, refer, cabinets, etc.

It's like buying a used car with the house bouncing and vibrating down the road. If you are not a DIY person then be prepared to hold your CC high in the air.

Search Google for ideas. Among other things search and develop a Pre Delivery Inspection (PDI) and make it extensive. Expect to spend hours checking YOUR list not a dealers or seller list. HOURS. Be prepared to walk away after you've drive 5 hours for the great deal. It's like buying a used car - don't believe anything they say.

Coveralls on and look for (rust, flooding, items that need repair. Look extensively for water leaks - water and wood get very expensive.

If you can find a good RV inspector hire him. Ditto mechanic for the chassis. NO one associated with the seller. Check tire dot age.

Make sure the RV meets your travel/living expectaions and the equipment and mechanical aspects also.

Good luck.

Welcome! And yeah the plethora of RVs out there makes it tough to compare apples to apples especially until one has been searching for a while and develops a feel for what they want and what mfgs seem better.
No one can give you specific advice as we don’t know your preferences and non of us can analyze the condition of said RVs.
So a few basic things.
Don’t get a Ford unless it’s a V10. The 5.4 is a dog.
Don’t get a Chevy 6.0 (basically only engine offered in your vintages) if you’re towing heavy, or at least know the 6.8 Ford has more power. But I’d take a 6.0 in general = to a ford.
Once you’ve found what you “like” for size and amenities, the rest is not different than buying a house and a car. 90% of what makes up a good used rig is its condition and how well it was maintained. And to determine that, use any means available to you.
Good luck!