Our second new unit was a 5ver. I had a bad cold on the day of delivery and I was already familiar (I thought) with how typical RV stuff worked. Plus, they made me wait a long time before doing the PDI. I was not very interested. I missed some obvious problems (like the generator would shut down after a few minutes). It was a pain to eventually get things fixed under warranty. The problems were discovered when I owned it, so I was responsible for coordinating the repairs. The dealer was 2 hours from home, so drop-off and pick-up both needed a day off from work.
For our next unit (traded the 5ver for motorhome), I did things different. I scheduled delivery in the morning (took the day off), just prior to final signing I told them I wanted to go look at it by myself, AND, I will likely be a few hours doing it. They were surprised, but couldn't say no. I spent the next few hours with my check-lists, meters, small tools, etc. and checked as much as I could. I found several small items, but no show-stoppers. They had to fix them before I took ownership.
My theory was that I would spend the entire day playing and investigating the new toy. Why not do that while someone else owns it? Half of my discoveries were just newbie lack of understanding, but I found that they were very keen on explaining and doing small fixes while I held the check in my pocket.
My point is, don't rush to hand over the cash. You are going to spend at least a day getting familiar with your new toy, why not do that before you actually own it? If a seller doesn't want you to spend time looking, maybe it is not the right deal.
