It makes sense to like, actually trade stuff, but having a magic item do that kind of thing makes very little sense.
If there's a kind of equipment that's hard to find, then crafters can get that using starting wealth even if it's not usually purchasable, but otherwise crafting has no use, pre-game.
Most mundane crafting by players is done with Fabricate or something similar, to speed things along.
And magical crafting is a clear tradeoff, where you spend time to gain money, effectively.