Gift a personalised Roblox Gift Card or simply use it yourself as a prepaid card to purchaseR$50 worth (4500 Robux) of in-game currency.

Here are all available amounts of Robux in exchange for dollars: $4.99/mo  450 Robux.R$9.99/mo  1,000 Robux.R$19.99/mo  2,200 Robux.