I had the same thoughts about buying very new used trucks with low mileage. The RAM was used buy one of the dealership staff (we met him), so no worries there and the Ford came from Enterprise Rent a Car (another HUGE red flag for me). The Ford was listed at around 14K under MSRP and the sales guy said he was flexible. I normally buy new trucks and probably still will, but the Ford was "certified", had a clean car-fax (maybe not) and came with a warranty. I asked the question about the 5th wheel mod because, I've yet to find a 250/2500 new or used (less than 30K miles that is) with it around here (Long Island), so I'd have to add it either way and I wanted to know if it can be done.
The Ford dealer did post a picture of the white door sticker on the web. The GVWR was 10,000 lbs and Front GAWR was 5,990 and the Rear GAWR was 6,340. That was all the useful info on the tag, other than tire info and the actual VIN. Oddly enough while typing this post, I noticed that the VIN posted on web ad and used in the CAR-FAX report was one number (the last digit) different than what was shown on the white door sticker. A typo or should I smell a rat? My feeling is the latter. My father always if something seems to good to be true, it probably is. Fortunately, my wife likes the RAM the best, but she's more concerned about the ride and aesthetic's. I don't care what it looks like, as long as it performs well and is reliable. Heck I've been driving an 2006 Tundra for 13 years and you can't get much uglier than that!
Some of you asked more about the trailers we are considering, so here goes. We both like the Grand Design line of trailers and 5th wheels the best. The wife likes the fit and finish and I like the way they are built. They seem to be put together with care and are well insulated. We are considering two of the Reflection 150 series (5th wheels), the 260RD (UVW: 7,225 lbs | Hitch Weight: 1,325 lbs | Length: 29'9") and 295RL (UVW: 8,496 lbs | Hitch Weight: 1,391 lbs | Length: 32'9"). As for Travel Trailers we are considering the Imagine 2600RB UVW: 5,725 lbs | Hitch Weight: 594 lbs | Length: 29' 8". We are also looking at others, but they are all close in size and weight to these. I don't want to go any larger than these. So in are these trailers well within the capability of 250/2500 or should I be looking more at 350/3500s? It's just my wife and I and maybe in the future a grand child or two, so all of these will do for a long time. Its also very very unlikely that we'll be upgrading to a larger trailer.
As for a truck, I'm leaning towards a new truck and I'd like a diesel, but that does add significant cost, hence the appeal of the used Ford. I'm going to call the dealer and vet out the issue with them. I will let you know what they say.
I really appreciate all of your help.