Your ipv4 addresses are a financial asset because the market for v4 address space is rising. The question is, for how long? Guest Lee Howard joins the ipv6 buzz podcast crew to discuss the financial implications of selling IPv4 addresses. They also discuss the performance and operational benefits of moving to ipv6.
Source: IPv6 Buzz 035: Selling Your IPv4 Addresses For Fun And Profit – Packet Pushers