The one Martin hammer I bought was something like $25 new and delivered, that's not a bad price at all.
At that sort of price If I had none I'd buy new Martin if used ones went readily available. Honestly after tuning up a used one and sometimes a new handle you'd be better off to buy a new Martin, but not as much fun..
My favorite hammer I picked up at a swap meet as an unfinished forging. I machined and dressed it, had a friend harden and temper the faces, and I put a handle on it. Round face on one side and other is like a pick except 5/16" round face.
