where can i purchase product keys?

Hey this is not a question of piracy, I just want to know where to purchase pc games product keys, cause i lost mine. Thanks

There's usually some on Ebay

Is it a Valve game ? Think its still $10.00 American from their site .

its for Halo: Combat Evolved

Contact the local reseller that imports the game with proof of purchase and ask them for what u need.