Whyyyy?????
All I want is a couple of pears and half my neighbor's boxes look like this:
Campers don't ask for these items. EVER! I have campers at max level 20 friendship so I know this for a fact.
Therefore, no one will ever need these items, so NO ONE WILL EVER BUY THEM FROM YOU!
Please delete them from your boxes because items show up by price, highest first, so when someone sees this they won't even bother going to your camp to look for something else.
I'm at max friends now so I'm deleting everyone who does this to make room for other people.
Some people do that as a museum. The price is high by default, and they don't want it to sell, they want to show off the rares they caught.
It can also be used to trade money, since there's no other way to send a gift to someone.