Not sure if this is a good idea or not, but think I'd like to see it in the game, so here goes.
When you scavenge blue or purple items, they have a small chance of turning into rares and uniques.
Likewise, I think there should be a small chance of your blue/purple crafts to turn rare/unique.
And I'm talking about small chances here. Really small. So hopefully this will not flood the market with rares and uniques.
I know some of you are going to bring up PayToWIn players who will pour endless amounts of fuel to get the rare/unique they want.
But they're already doing that with the DMU and looter 15%s. And if Con can control the number of rares they scavenge, I'm sure he can control the number of rares they craft. And maybe he can limit the number of rares people can craft per month like he does the number of rares they can scavenge. (He does that, right?)