In my experience, PPL is not the best bet for a diesel pusher, especially if you are looking for a newer, higher end rig. I had a very bad consignment experience and had the displeasure of having to be there for a few days. That gave a lot of time to look around. PPL has many, many RVs for sale, but most of them are older and in less than pristine condition. You will be incredibly lucky if you get anyone to help you look at the rigs. They will be priced semi-reasonably, but remember it will be about a 50/50 mix of rigs that people are willing to sell of a reasonable price and rigs that people have to sell because they have a loan on them and no money to pay the difference between the payoff and the value. Those rigs aren't going to be negotiable, because there is no way to pay off the loan if they don't get their price.
I agree with some other people, they do get a bit poetic in their determination of condition. Part of that is because apparently a whole bunch of people don't feel it is necessary to make their rigs showroom ready before they take it there for sale. I was amazed at how much small stuff was not taken care of which made the rigs look much worse than they probably were. Things like torn blinds, missing trim, broken hinges on cabinets, TVs removed and wires just laying (or is it lying, I never can get that one right) around.
PPL is probably a good place to shop if you are looking for a 10+ year old rig. If your tastes run 3 to 5 years old, unless you see something that actually grabs you on their website, don't waste your time and money going there on the hope something good will be there.