Can’t see any rules against this in the subreddit rules, but apologies if it’s not allowed.
I’ve got a collection of 18 minna no nihongo books (小・中 I & II) that I know are still used as textbooks at some universities. I’ve already passed N2 (and studied for N1) so never really got around to using the books, they are in perfect condition.
I’m trying to sell off the set at the moment to raise money for some travels/proposal over the summer, so please take a look if you’re interested (price of all these books new would typically add up to about £350-400).
https://www.ebay.co.uk/itm/166114680076