The auction for questionauthority.com closed yesterday on Go Daddy for $1000. The domain is 14 years old and Go Daddy estimates no traffic. There were 26 bids among 5 bidders.
The domain questionauthority.net is listed for sale on Go Daddy for $1,888. It seems like that price will have to come down with the .com selling for only $1000.
Owners of other extensions have to be cognizant of what their name in .com sells for imo. Of course its their name and they can hold out for whatever they like. The point is if you really want to sell for a reasonable price, most times .com dictates the pace.