Negotiations.
To complete the transfer, the buyer and seller will need to negotiate, at which they must discuss all the details of the transfer of the IPv4 address, as well as the cost. In the process, an agreement about confidentiality terms is concluded. The agreement should specify: when the buyer should transfer funds to escrow, to whom he should transfer, when the seller should initiate the transfer, when he should receive it. Negotiations should pass under the supervision of a broker.