It's abit complicated, but be sure to go through these steps.
Step 1, Post your items on D2jsp, in the correct subforum, (use Ctrl + C while howvering over the item you wish to sell & Ctrl + V On Jsp)
Step 2, Email GGG your in game character name, and they'll verify your account to enable global trading.
Step 3, Create your own shop, on the PoE forums, Click on character portrait, > inventory, then click on the items you wish to sell. Put the correct price you want to sell as ~how much = 9 wisdom screwls.
Step 4, Post your Shop on
https://www.reddit.com/r/pathofexile/.Step 5 ???? Profit.
I know, but it's what they said, trading in this game can be a hassle, but it's really worth it in the end,
Proof>
See how much Exalteds I made last week?