Why is rock salt so rare?
Title of the thread explains the purpose of the thread.
im selling 1 rock salt
but i have no idea how much its worth
can u guys tell me that?
That it is not so rare anymore. After they made the release that added the whole bunch of missing materials (Sun Silver, Everfrost etc.), I am positive they also upped the drop rate for things like Rock Salt, Meteor Motes, and Swordstone. The day of the release I acquired no less than 4 Rock Salt.

Well when was the last time you saw anybody eat in this game?
If you don't eat, you don't need to put salt on things.
Rock salt has other uses. Are there any snow levels yet?
Maybe Rock Jellies are supposed to drop rock salt, but because they leave behind a little goo when they die, any rock salt they would have dropped is instantly dissolved.
Wish I knew. In nearly three months of playing I've only seen it drop once even though there have always been a recipe or two requiring it. Perhaps it should really be a 4 or 5-star item instead of 2.