I need a marketplace website made based on Roblox

I need a website made where I can sell Robux its the virtual currency on roblox.com I need a well-made admin panel where I can stock all the Robux to sell I also need all the purchases to be made using the payment gateway Stripe examples of what I want my website to be like are https://rbxexchange.com/ and https://beta.ro.place/home as well as https://adurite.com/