An “18+ Roblox account” usually isn’t sold as a legitimate separate product; Roblox accounts themselves are free, and adult status is tied to the user’s age/verification on their own account rather than a special paid account type.

What the market shows

Public listings that advertise “18+ verified” Roblox accounts are often asking around $5 for a basic listing, while some higher-priced pages show $9.99 to $19.99 for “premium” style offers.

Important caution

Those resale listings are not official Roblox pricing, and buying accounts can be risky because account trading and purchasing may violate platform rules and can lead to scams or account loss.

Safer option

If your goal is just adult verification features like voice chat or age- restricted experiences, the safer path is to use your own account and complete Roblox’s age-related settings/verification on it.

TL;DR: legit Roblox accounts are free; third-party “18+ accounts” are usually listed around $5 to $20, but they are unofficial and risky.