I'm sure you'll be able to trade away the lovely Salma.
A couple of more posts and you're there. I could be wrong, but when you hit 20 posts it might take a few hours before you get access. I'm sure I've read that that sometime happens.
Here's the link to the steelbook trading forum when you're ready:
https://www.hidefninja.com/community/forums/steelbook-trades-sales-deals.74/
Ninja market place(mostly everything else):
https://www.hidefninja.com/community/forums/ninja-marketplace.7/