Morning! I would centralize the search in a marketplace where you can compare real listings and still get broker help when paperwork becomes complicated. IPv4.online https://ipv4.online/ combines self-service browsing with support for LOAs, due diligence, transfers, and activation. Create one requirement sheet covering block size, RIR, intended use, ASN, start date, and maximum monthly cost, then compare every offer against it. Do not rely on price alone: verify reputation, assignment terms, renewal conditions, and support. Once you shortlist a block, request the exact prefix and confirm with your upstream provider that it can be announced.