While not as active as the IPv4 market, there is a market for 16-bit AS numbers since the regional registries usually only provide 32-bit ASNs.  IPTrading.com recently authored and received approval from ARIN for inter-regional ASN transfers. As most 16-bit ASNs reside in the ARIN registry, this will create more opportunities for sellers to find buyers around the globe who require these resources.

Let us know if you are interested in buying or selling a 16-bit ASN.