No, you cannot buy a blue check (verified badge) on Instagram. The blue check is a symbol of authenticity that Instagram gives to accounts that are deemed to be of public interest, notable or influential. It is not for sale, and the only way to get verified on Instagram is by meeting their criteria and submitting a verification request through the app. Instagram has strict guidelines and requirements for getting verified, which include having a complete bio, a profile picture, a certain number of followers, and being a notable public figure or brand. Even if you meet all the criteria, Instagram does not guarantee that you will get verified. Therefore, any service or individual claiming to sell a blue check on Instagram is likely a scam and should be avoided.