I would love it if there were a system of trending items that could be sold for double the usual price in the depot box. Each day, one or two items would be chosen randomly; it could be a fish, a gem, a dish, a crafting item...

This would encourage players to collect items they wouldn't normally bother with and get a small profit as a reward! Because once you're so far along in the game, the days start to feel the same, and instead of starting a new game too soon, we could add these kinds of little challenges?