We just bought a small TT that was the least expensive on the lot and the tech assigned to our PDI was just a kid (as in maybe 23 or 24) and my cranky old me was pre-disposed to expect a half arsed run through. What I got was a very thorough PDI covering virtually everything about the TT, how to keep out wasps and mice, tips on storage, where to go for our first camping excursion etc.
When I asked about some extra things I was thinking of he said they had some, he said Walmart had a good selection of stuff and he identified a couple of competitors stores as other sources. We couldnt be happier.
If I were the OP I would have walked away and told the tech to explain to his boss how his attitude cost them a sale.