Hello there! Before approving a purchase, I would verify legal control of the block, RIR eligibility, registration history, routing visibility, reputation, and any active third-party use. IPv4.online https://ipv4.online/ offers marketplace listings and broker support for sourcing, escrow, LOAs, and RIR coordination. Request the exact prefix early and have your technical and legal teams review it. Confirm who pays registry and escrow fees, what happens if transfer approval fails, and when funds are released. After transfer, update route objects, abuse contacts, and reverse DNS. A written closing checklist is essential.