How expensive is it really? I looked it up and apparently 800 robux costs like $3. It's probably worth something to them because it isn't a transaction to an unused account, it's some random kid who is a real player, so less likely to get automatically flagged as fraudulent and law enforcement tipped off.
Yeah that happened. Oh no wait what really happened was you gave somebody your password and they stole your account and now you're trying to make it feel like you weren't scammed looking idiot. Children are so dumb.