Can you buy or pay to improve reputation?

Reputation cannot be purchased legitimately:

No provider sells reputation. Gmail, Outlook, and Yahoo do not accept payment for improved filtering treatment. Their business model requires protecting users, not helping senders bypass filters.

Certification programs like Validity charge fees but require demonstrated compliance, not just payment. You must earn the certification through quality sending.

"Reputation services" claiming to sell improved deliverability are usually scams. At best, they might provide clean IPs that still require proper warmup and maintenance.

IP and domain purchases may include existing reputation, but that reputation will quickly adapt to your actual sending behavior.

Reputation is earned, never bought. Anyone claiming to sell it is either deceiving you or selling something that will not survive contact with reality.