Internal trading

Before anyone sells important legendary/rare cards on the market, perhaps consider announcing the trade internally first,
Meaning lets trade/exchange with each other. It could be less expensive too that way to obtain cards you want in exchange for others as you only pay the transfer fee..
So if you have something like that to trade, perhaps a duplicate card, announce it stating you are looking for offers and list possible card(s) you would be happy with in exchange for it.