Other than this forum is about bug reports, my reply doesn't have anything to do with his reply. I did it purely because it would be easier to get a reply if you reply to the creator yourself.
About the issue, I was a bit wrong. You are right, two handle guards are 3$ not 5. I've just checked about it.
With no charisma or any other abilities upgraded:
The profit wasn't one dollar but two dollars. its still low though.
fancy two handle = 6$ two handle guard = 3$ greatsword = 30$ = 39$ to make, 41$ to sellOh and i just noticed that you don't get any profit on daggers.
Copper dagger = 10$ copper, 5$ fancy handle = 15$ make, 15$ sell meaning no profit.You mostly gain 5-6$ with fancy handles on every weapon other than daggers, greatswords AND one hand swords.
Also, you don't have to use the normal hammer heads, as customers accept great hammers as one handed/two handed and polearms.