Put it on an auction site, set minimum price much higher than you expect to get for it, give it a long time-frame, and see what happens.

It's definitely worth more than $1,000 to the right person.

Also interested for ex.net, which I now have available for sale. My previous contacts have gone quiet, and I haven't gotten sensible answers from other sources. And the 'auto' value estimates have a range even wider than you saw, it seems!