If you're looking to sell IPv4 address, there are a few things you need to know. First, IPv4 addresses are in high demand right now due to their scarcity of them. This means that you can get a good price for your address. Second, you need to find a buyer who is willing to pay what you're asking for. You can find buyers by searching online or contacting companies that deal in IPv4 addresses. Finally, you need to make sure you have a valid contract with the buyer. This contract should include the price you're selling the address for, the terms of the sale, and any other relevant information. Once you have all of this in place, you can sell your IPv4 address and get a good price for it.