It’s not easy to come by, but there are many ways to get Platinum, and it is quite easy to farm some items that you can sell to other players and earn enough for the weapon slots. Melee weapons can be equipped in the tertiary slot of the arsenal in Warframe. Any two Weapon Slot expansions for your Warframe character costs 12 Platinum, which is the premium currency of the game. Warframe Weapons Compared Previous Next Complete Warframe Weapon Tier List. When you want to expand the amount of weapon slots you have on your Warframe account, you’ll need to make your way over to the Market module, which you can find in the Orbiter. For every item you sell in Warframe, you’ll receive credits for offering up that item, and it’s important to note you won’t receive other resources or currency for this action. There’s no wrong answer, and it’s an entirely personal preference. You can choose to have multiple items on this list, or you may want to go through everything one at a time. After clicking any of the available items you have on the screen, these will appear on the right side, and you can select which ones you’d like to sell at the bottom of your screen.