I've had few takes on some of my released domain portfolio and a few have been, to me, derisory offers. I've almost cleared them out now, so there's not much to get excited about. None of the domains I have left are 'fancy' domains. I'm sure that's part of it, but the offers have dried up, too.
I read this piece today and part of it seems to indicate the same as i'm seeing.
Just like its physical counterpart, the market for Internet real estate has been in the doldrums in recent years, especially if you are trying to sell a fancy address for millions of dollars. Has The Domain Name Market Lost Its Shine? [sfgate.com]
I'm not seeing much movement either - a few offers here and there mainly for 'short' domains - like you I don't really have any high value premium domains.
I think there is a bit of wait for the new tlds to come happening - buyers are looking at what might be available relatively cheaply in the next year or two and thus holding off purchases of second or third tier domains for the moment.