sr you are right about that.. ^_^! wonder how much it would cost to buy a custom weapon he makes
Depends on the size of whatever he's making. I think small stuff is usually in the neighborhood of around $300 or so, but it gets more expensive pretty quick, especially the more ornamented/complicated you want stuffs.
The science behind the materials is pretty interesting stuff, though. It's not in my field, but I did take somewhat of an intro class to materials awhile back, and it's all pretty neat. Would definitely recommend (taking a class, at least) it if you have the time, need the credits or whatever.