Several options:
You can buy the hammer at the general shop in the main stock!!
You may pick up a hammer in the upstairs of the forge in Falador, or may receive one for free from the Lumbridge General Store.
Grand exchange.
buy at general exchange.
the grand exchange on runescape
No "hammers" have ever been available to buy or get on clubpenguin and i don't think its likely that they ever will
The torag hammers,dharok greataxe,dragon 2h,godswords,but mostly the barrelchest anchor.
Creating oak dungeon doors using Stealing Creation hammers
You can buy membership at stores like Target or at the Runescape website.
Only buy runescape membership from their site, look on homepage.
Off of the RuneScape website.
Online, through the RuneScape website.
buy a saradomin sword
We can buy it in grand exchange.