Buying IPv4 addresses for your IT business is similar to buying a house. You contact a broker and work with them on the required IPv4 addresses. Based on the listings they have at the moment, they'll provide your with a quote and help you buy IPv4 addresses. Similar to the housing market, buying IPv4 addresses means you're dealing with a sellers market. Commonly several parties are looking to purchase the same resource, resulting in scarcity and consequently driving up prices. So it's important that you're well informed on your requirements and have an indication of (expected) required budget to buy IPv4 addresses. In addition, you should be able to decide quickly. The broker will provide you with a quote on the prefix you're looking for, including details on the size of the prefix, which region ( like RIPE NCC, ARIN or APNIC region) the prefix is currently in and what the total pricing will be. If the buying party decides to sign the quote, they're introduced to the seller and agreements are made on the actual sales and escrow. Both the seller and buyer then communicate directly and transparently on prefix ownership, payment, signing and more. Once the paperwork is all signed by all parties, invoices are sent and the payment is transferred to the escrow account. Once payment is received, the actual transfer is started with the RIR of the seller, and typically a transfer of IPv4 addresses is then completed within a couple of days up to a week. After the transfer is completed by the RIR, the payments are done from the escrow to the seller and broker and the transaction is formally completed. To buy IPv4 addresses is thus a rather complex process requiring sufficient knowledge of the procedures and matters involved. Your broker will navigate the process and help you buy IPv4 addresses you need.