Valaine's Shop of Champions

Valaine's Shop of Champions is run by Valaine on the second floor of the Champions' Guild south-west of Varrock. While the Shop of Champions restocks only Blue capes, Black full helms, Black platelegs, and adamant platebodies, it is technically a general store meaning it is possible to sell any item there that you can sell to a  general store, but when you sell items to the Shop of Champions you will recieve twice the price the general store pays for the item making it a good place to sell to if you have the required 33 quest points to enter the Champions' Guild.