I'm curious of what you would think if such a situation occurred:
Example:
I'm buying a second hand TV for $500 on FB marketplace. The TV is still under 3 months warranty, and it cost $1000 new.
The TV breaks after a month, the guy is nice and send me the invoice, and all the store details.
The store is nice as well, as they can't repair it and don't have a similar model in stock, they offer to refund the total amount ($1000) to the original payment method.
the marketplace seller receive the $1000 amount on his account.
How much would you expect to get back from the marketplace seller?
Fair amount would be $500 and that way no one is out of pocket but buying on marketplace if I got nothing back (ie seller kept the full refund) it wouldn’t at all be a surprise (and quite annoying)