Sounds like a decent idea to me, maybe give you a chance for a small fee to do a different loadout, hope for a better chance of good weaps. This was just a cool random idea to me!
you already can but those are usable once per x match.
believe me that many i have wanted better weapons (once had only bit better than guest's weapons who doesn't have airstrikes).
It would help if you could buy ONLY ONE weapon in a game... Or maybe two

..
But this is a good idea although it would kick the non-pro player's wins to 0 (Myself included

)...