Participating in the "test run" fiasco means you're signing up for teaching boat driving lessons, explaining what tilt/trim does and how to launch/load and secure on the trailer. Ain't nobody got time for that....they can figure all that crap out on their own. If you have to explain the importance of the kill switch lanyard then they get the impression that the boat tries to throw you out of it all the time.....and they get nervous about buying it. It's a catch 22
The reason you're selling a boat is because you want out from under it, so taking it out for multiple "test runs" just increases the odds that you'll hit a log, ding the prop, put a scratch on it, or blow the powerhead and lower its value.
Buying used is buying used. If you want a full 5+ year warranty and a guarantee that you'll be 100% happy with it, and that your wife will love it too.... then buy new. 😊