Naked bike for big riders

Hello, I know there are already quite a lot of threads about this. But I still had a few questions. So first of all: I made my driver’s license last summer and would like to get a naked bike this spring. Does it make more sense to go to the dealer and possibly pay more or a private purchase? How do you want to test a motorcycle if you are not allowed to move it legally? I am looking for a moped for a height of 193 cm. I know that nothing goes on pro-owned but I would It should have no more than 96 HP because of the EU directive. Feel attracted to Honda CBF or Suzuki GSR/Gladius. At Cycle-ergo I get a knee angle of 84° and a hip angle of 81°. Do these values fit in about? Thanks