With copper prices going through the roof nowdays, I'm suprised that brass prices are not higher than they are.
Brass is a combination of copper and tin. Exact % differs between uses for brass.
Bronze is copper and nickel.
So, both of these metals, I expect to go up considerably until copper returns to a normal cost. I haven't noticed that much change in price for the brass I buy, but then again, I may just be buying their current stock that has not been affected by the increas of copper cost, yet.