The problem of crafting and shops of giving too much gold is not that big. Think about it. First, there must be a market. If Rinaldo starts to sell headbands of intelligence +4 now, he will have difficulty to find a buyer, because no one have such money.
If there is a lot of buyer that appear, be sure that more crafter will appear too.
Finally, as some said, you need all the pre-requisit to build an item. It isn't because you have a feat that you can craft the item.
So, yeap, it has a potential of getting some people rich, but that's a potential for now, nothing more. At the speed LEW characters evolve, I think it will take some time before such unbalance can be seen.