No they don't really sell for more. Only the 1 star and 2 star items...Or the items that are REQUIRED to make 1 or 2 star items will sell more definitely but anything lower, its a hit or miss....

I honestly just leveled up Alchemist to save my arse since I'm going to DoM this game all the way. Thats it. It's kind of b.s to craft something and sell it for less than what you paid for.
Trying to level up Botany right now, but its hell because its just so boring. :/ I'm not up for all this disciple of hand/land type of jobs but... they help.... in one way or the other....