i’d say $200 is fair for that but if they were willing to pay $300 initially and brought it down due to the sticker residue, just remove the sticker residue and send them a pic. they might not go back up to $300 but $250 isn’t a bad price for a 128gb laptop in 2023.
reminds me of that spongebob episode where patrick tries to remove a lid from a pickle jar.