I think the person means the ones given our when Cryptic heavily taxed the hardcore side of the player base. This was before my time but the players I do know that experienced that conversion were not happy with the outcome. Veteran BO's go for about half a billion EC or a Jem'Hadar Attack Ship each.
Looking for a new fleet? Drop by the in-game chat channel, "tenforwardforum", and say hi to the members of A Fleet Called Ten Forward (Fed) and The Orion Pirates (KDF). If you already have a fleet you are happy with, please feel free to drop by our chat channel if you are looking for a friendly bunch of helpful people to socialize with.
^ That, and extreme scarcity. They were only handed out to people who lost a lot of value in the conversion of their old marks and commendations in the conversion to dilithium, on a per character basis. No way at all to get them now other than buy them off of these people.