The accounts, activities, items, games and models are for you to play with while on the site. Except as permitted by the functionality of this site, you can’t sell them (for money or ROBLOX Points), give them to anyone, trade them for anything (including ROBLOX Points), or pretend you made them.
you cant sell stuff or any asset on/off Roblox because selling assets it was a major scam for other users and if you try to sell it you will get a warning. so you cant, even you have premium or not a_ristocrat (aristocrat) May 25, 2020, 1:51pm
How do you sell stuff on Roblox? To sell an item that meets the above requirements, first go to its details page. Once there, click the three dots above the box that contains the price and Buy Now buttons. Then select Sell in the menu that displays. You will then be given a box that lets you set your price.
To trade items on Roblox, start by going to roblox.com and enrolling as a member of the Builders Club for a monthly or an annual fee. Next, collect items to trade or invest in the game’s currency of Robux. Make sure that your account settings reflect that you are open to trade.
Right now only an account with a membership can participate in private selling. Additionally, as with trading, only items marked as Limited or Limited U are able to be sold. If an item is Limited or Limited U, there will be an icon declaring it as such underneath the item's picture when viewing its details page or when browsing the catalog.
If you would like to create pants, a shirt or a t-shirt from scratch, you can sell those as well. For steps on how to create and sell items, check out the Developer Hub for more information.