It is neither possible to sell or buy player items in WoT nor Wargaming ever heard of you nor they have plans to start accepting cryptocoins so you
got negative trust rating from me. I'm WoT player since closed-beta (email invites) and I have direct contact with Wargaming team. You are liar, bye!
Very strange, that so old player does not know about gifts. Any item in gift shop can be bought and sent to another player as gift. Any item, excepting gold-and-silver packages, has it's price in gold. So any player will be able to sell us at exchange some amount of WOTcoins, according to exchange rate this amount will be converted to appropriate amount of gold, or item price in gold. Then we, from our own funds will buy this gold or item at gift shop and send as gift to player account.
So Wargaming itself will not be involved in changing process any way, thay will get only fiat money, as usual.