Roadster purchase decision support

Hello, now it’s finally time for me to finally get a “fun car” as a second car. It’s going to be a used car, price should cost up to 2000€ and I’m first open for everything. With me, the BMW Z4 and the Porsche Boxster have fallen into the narrow selection, however, it could also be an older roadster a la MGB or Triumph. Now first of all my question, someone has an idea how I know such a wide range of vehicles for the first time nlearn can go without e.g. to the Porsche Center and drive a brand new Boxster test, because that probably makes little sense? There are some Boxsters at Autoscout, which I like very much, but I would have to take 2-3 hours to get there and so I would like to know beforehand if it should become a Boxster at all. Also I don’t know if it is ok to call private sellers near me and ask for a test drive if it is clear, d a used car dealer in Brühl refused me a test drive with an old Porsche, because he gets on his nerves with the test drive tourism. I have been driving car for 25 years, I have driven almost everything from 50-300 hp, but neither a Porsche nor a BMW Z4 or an old roadster and my decision should be based primarily on which car I personally am personally, just makes me most happy. I usually have a first impression after 5 minutes to know if I like a car. How do you do when you want to get to know a roadster?