Here are a couple of steps you should take if you'd like to get someone an online Robux gift card as a present. Consider the cost of Roblox items before deciding how much to spend on the gift card If you're not sure how much you want to spend on this gift card, you should do some research online before deciding on a set amount. The reason for this is that if you don't use the Roblox platform yourself and don't know what you can buy with a certain amount of Robux, you might either end up giving the recipient a gift card with so many Robux that they run out of ways to spend them or with so few that they cannot buy the things they want on Roblox with this gift card.