there should be an option to right click on another player for a trade request. it could work like the kin system where the player has to accept.
once the trade is accepted it basically opens like a 6x6 inventory where both players can take/give items or it opens an interface for trade.
the trade interface could be like the system used in runescape. you place your items in your side and other player in theirs. both players have the option to accept or decline the trade. the items are then exchanged.
idk what the best way to set that up would be, but in my opinion something like this needs to be in the game.
stand are still great, but there isn't always a chest/shed around for quick hand to hand trades.