First and foremost welcome to jsp!
Here’s a link on how trading works, give this a good read to begin your journey.
https://forums.d2jsp.org/info.php?p=10To answer your question, everything should be done through jsp to avoid any confusion/potential scams/ect
The guide I gave you above will help you. Also we have a mediation system if you don’t feel comfortable trading with a user. Here’s how mediations work:
https://forums.d2jsp.org/info.php?c=4&p=11If you have any other questions fire me a PM
