The domain name discoveries.com sold yesterday on NameJet.com for $10,000.
With over 16,000,000 references in Google, its a nice one word domain but is always going to lose IMHO a lot of traffic to the singular discovery.com.
A few other notable sales:
StockRatings.com sold for $3,535
NewUsed.com sold for $3,100
BlueGarden.com sold for $2,400
Suitcases.org sold for $1,611