We bought our previous 5er 250 miles away sight unseen. It was a well respected brand and we had toured the same model at a different dealer. They didn't have the reputation of the dealer we bought from so we just went there to look. Spent 45 mins inside checking it out with the idea of normal usage e.g cooking, storage, sleeping, etc.
When I made the deal 250 miles away it was with no deposit and just a phone shake so to speak. Got all the financing approved and drove over to pick it up. Before signing anything we did a walkthrough and were told if we're not happy then we could walk.
That 5er was the most reliable RV we've owned. had it for 6 years.
So yeah under the right circumstances there's nothing wrong with buying unseen.
You just need to do your research.
