Players for sale

[slowisfast]

How?
I can't even sell or buy a player from my daughter that's in the same household as me.

Wherever I look, no answers, just some things as a guidances, but even though I check all the boxes I can't do anything...

HOW do you manage to connect with anyone, and put your players on sale? Or how do you buy a player from anyone that wants to sell you their players, but that green box is still "seethrough" for them and you...?

The ones that I can buy players doesn't have what I need; I don't want their players, I want to buy players from people that are my friends, that I play with? So how the players I need get on that list for negotiating; how do I put my players out for my friends to buy?