For 100 Zen a person could test a Zen store ship for one day. "Kick the nacelles" I suppose. They could use their own gear but the gear would be returned to their inventory or bank in case they forget to remove it from the ship.
I think it would help people avoid buyer's remorse on a ship and Cryptic would make a little something off of the testing and get some feedback from a larger percentage of people about the ships.
I guess there would need to be other rules like you can't test the same ship more than 5 times or something too to avoid people just test driving the same ship over and over.