Hey man, I’m sort of new to this too.
On your first trade, go with someone who is respected and has a high trade count.
It is all free, your trade count is sort of like your reputation
You can trade yoyos, yoyo acessories, kendamas, and other goods but mostly yoyos
To submit a feedback Go to the users profile, scroll below the feedback and just bellow it is bold text saying submit feedback.
You give positive feedback to somebody who got the yoyo or money to you within a reasonable time. If something came up and they couldn’t send it to you right away, don’t give them bad feedback, bad feedback ruins their reputation.
Lastly, the other person may require you to ship first. Ship First. If they are going to scam you, you have the power to give them bad feedback and suddenly their hard earned reputation is ruined. We are all yoyoers here, nobody wants a yoyo badly enough to ruin their reputation and ability to ever trade on the forums again.