I purchased a MET Premium from a fellow pinsider back in October, 2017 and absolutely LOVE it. When I bought it, I specifically told him to leave his scores on it so that I'd have something to aim for.
Since then, I still haven't made any of the top scores overall or for modes (although my sister played and got her name in for Lady Justice mode...)
A couple of nights ago I came SOOO close to getting my name in the top 5: https://pinside.com/pinball/forum/topic/metallica-owners-thread/page/264#post-4343972
However one person commented that he doesn't want a stranger's name on the machine so always resets them.
I'm not going to reset the scores - I like the challenge - but I'm curious if most people keep the scores on the used machines they purchase or if they wipe 'em so that they're the only ones with their names in the game.