We bought our 5er from them a couple months ago. Large selection, easy to deal with, sales guy was kinda goofy (new?), but ok. Parts people are helpful but busy. Make-ready guy went over trailer really well when we picked it up. Spent about an hour and a half with us.
My only complaint was they dont really do anything to clean them or detail them. They sell them pretty much the way the owner brings them to the consignment lot.
Also, I paid for the full inspection service. They told me everything was good to go, even said that the tires looked good. All but one were Goodyear Marathons with a 2008 build date. Not knowning any better (RV newbie) I didn't give it much thought. Checked air pressure and hit the road. Had a blowout within 100 miles. Put the spare on, continued trip, made it home ok only to see that another one of the tires had began to deform and was only minutes away from blowing up. Had to replace them all. If I had known they needed to be replaced immediately I would have negotiated the price down some.
Other than that our experience with PPL has been good. Decent parts and accessory selection in stock too.