I don't know. Hence my question. But I would have thought, that the traditional players, GoDaddy, Sedo, Afternic, would do well. They are well known, have good infrastructure and reputation, and I see a lot of New GTLDs being available there, except at GoDaddy, whose search seems to be against these NGTLD's totally. Clicking on the TLD boxes NEVER brings up any results. GoDaddy could do better here. Afternic's Search capabilities seem to also have some of GoDaddy's affliction for searching the NGTLDs also. But at least they identify some domains for sale.