At PPL there is absolutely no typical salesperson involved. You casually look on your own. No salesperson will be following you around. If you have questions on a specific RV then the sales person will try to answer it. However, they only know about the RV what the owner has told them. They will do a general inspection of the appliances, etc but I'd highly recommend that you have a complete inspection done before purchasing. It's no different than a used car lot.
PPL will suggest a selling price but we put our own price on it and it sold for that. PPL has an excellent detailing dept. and we had them detail it inside and out. Many owners do not care so you'll get a mix. When you look at used RVs by owner anywhere, you'll find that many have no pride in their RV... never could understand that.
When we were there dropping off our motorhome there were many happy customers leaving after having purchased one. We were astounded at the incoming and outgoing traffic. It's a VERY busy place.