[Sting.]

Well, guys I need help on some simple code. Well I created a /shop dialog box with weapons and armor. What I need now, is for players not to abuse the Armor that can be bought from the /shop. At Dialog response, I use SetPlayerArmour but what I need help now is, how do I set it to that the player can only buy Armor once per life, and only after death they can buy again. For example, in 1 life, they can't buy more than once. How do I do that?

All help will be appreciated and rewarded with +REP. Thanks, in advance.