Board Thread:ROBLOX help and discussion/@comment-33990837-20171223102334/@comment-26397550-20171223154302

A system like this used to exist, but they probably took it out on purpose to get you to buy more so that you can afford something. I tend to sometimes try to keep my Roblox Card payments for BC (can't connect a credit card) up in a range where I have enough to pay it over after a $10, so keeping it over $12.

It's kind of weird because not until 286 Robux do you actually make enough to be equal to a dollar in USD via DevEx rates. 450R$ for $4.95, but if you could trade back 450R$, you'd get $1.57(?). Kind of a ripoff, in context. (Devex rate is 0.0035/robuk) Probably why they removed the feature- people would notice easily that the buy Robux rates vs. DevEx by Robux rates are no where near the same.

PS, removed a dangerous/scam part of your post, seeing as the rest of your post is legitimate.