Your comments

please look what i said below what you said makes no sense

You will buy the weapon/hull for full price, but if you want to sell it, you only get 80% back from what you first started with. This will restrain players from selling because they will slowly lose their crystals. So even if they dont want that specific hull/turret, they will lose crystals in the process tanki management should really allow this. Besides, most people buy now anyways, you can use real money to buy almost anything in the game which is really stupid