Roblox Premium subscriptions are vital to the money-making experience because they let you trade items. That's an essential action if you want to make Roblox sales. The plans come in three tiers ...

When creators who make and sell their own in-game items opt-in to the new regional pricing feature, Roblox will automatically set the “optimal local prices” for those items, according to Roblox.

Remember, the Roblox demographic is mostly made up of young children and teenagers. So, if you charge Robux for a perishable item, make sure that it's also available without purchase in some fashion.