According to the Roblox Terms of Use §4. Robux and Developer Exchange, Robux trade is illegal and is a violation of the Terms of Use except otherwise permitted by Roblox Corporation or the Roblox Terms of Use: Final Payment. All payments for Robux are final and not refundable or exchangeable, except as required by applicable law. You may not transfer, assign, sell, gift, exchange, trade, convert, lease, sublicense, rent, or distribute Robux except through the Service and as expressly permitted by us. Any disposition or attempted disposition of Robux in violation of these Terms will be void and will result in immediate termination of your Account and your license to use Robux. We do not recognize or condone any third-party services that may be used to sell, exchange, transfer, or otherwise dispose of Robux. We do not assume any responsibility for, and will not support, such transactions. (from the Roblox Terms of Use) Unless you have written permission from Roblox Corporation, do NOT participate in these illegal trading sessions. Also, do NOT start these. Roblox Corporation has a right to start a lawsuit against any person/persons and/or entity/entities violating these terms. I am not affiliated with Roblox Corporation or any of its affiliates.