Originally Posted by
AnnirasSweets
It all comes down to personal preference and which aspects of the game you like to focus on.
As a collector, I never sell anything in the game simply for the fact that they may be removed from the market at some point. In regards to appliances in particular, I always keep those as well. One because there are certain recipes I'll serve after mastering because they match my current theme. And two, because every 5 Day Goal uses a previously released appliance so for I have several already built I can get a jumpstart on that goal.