I have the following posted at GreatDomains.com
Conventions.cc
Birthdays.tv
Interests.tv
Engines.tv
Barbiturates.net
Alignments.net
Amphitheaters.net
Circulates.net
Consigned.net
Depressants.net
Burnable.net
Separtes.net
Lyricists.org
Organizations.tv
Telephones.tv
Tricks.tv
Baths.tv
Calendars.tv
Postings.biz (accepted, but never listed)
As you see, no .coms. Hard to find a good one they will accept. Also, they push .tvs, since GreatDomains.com and the .Tv Corporation are both owned by VeriSign, iif I am correct.
These are all listed from $5,000 to $20,000 for Telephones.tv.
Don't ask me how Great Domains decides to accept a name, other than they want generic names. Most, or all of they have a terrible Overture ranking.
It's no big deal to have them on there, unless you sell one. As far as I know, I haven't even had an offer on any of them. Spent a lot of money on .tv's, not a penny in return. It would have to be a super good .tv name for me to register one now. Plus, .tv's have a 2 year minimum. None has been posted longer than a year.
You can get one on there pretty easy, you just have to concentrate on 1 word generic domain names.
Good luck, hope this helps.