In the last 2 weeks, reported, 3D sales have actually seen an increase in the average price paid, compared to any other 2 week period in 2010.
3dfilmworld.com Aug 2,2010 $1,000.00 Sedo.com
3dsmartphone.com Jul 30,2010 $900.00 AfterNic.com
cheap3dglasses.com Jul 27,2010 $1,000.00 Sedo.com
(Exceptions made for the private sale of 3dtv.co.uk for $22,650 and 3d.de for $27,928 at sedo earlier this year).
As far a 3D "hype", or news, a quick look at
Goog Insights shows the graph currently going up and searches for '3d' at "+350%".
And, with Avatar: Special Edition coming to 3D theaters Aug. 27 --with "eight minutes of never before seen footage, including new creatures and action scenes", I expect we will see the "+1,000%" range spike in '3D' searches seen when the original film was released last year.
Bottom line... the 3D market is doing fine. Like any product, the best place to sell your 3D names are places where you can position the product / name in context with the (popular trend) market.
There are places like that... but you have to find, or create, your own conversations/forums/groups. IMO, the domainer forum is the most hostile 3D name market as any conversation, even this one that simply asks 'where to sell', is interrupted by others pitching other types of names, that they happen to sell.