[UNPTWOPWINNER]

Well, I decided to do quests again, and this time I'm getting 30 charm, since I get 26 already...so 4 keys should be nothing.

Well, I got my 26 charm ready, and checked on the selling price on some mushrooms, then I used the potion to get 27 charm, checked the selling price...and it was the same.

So in the end, I wasted a gold key and my time...and screenshot is proof I guess. Notice first sell price, then the "You seem to look better." message, then the same selling price.