GHB.com domain name was recently sold through Sedo for $29,000 .Another three letter domain name,ISG.com,was also sold through Sedo for $23,000.
Here are other domain names recently sold through Sedo you may find interesting:
swissdomain.com 1,000 EUR
branchenbuch24.com 500 USD
alaindairy.com 2,000 USD
vergleich-versicherung. 588 USD
iusy.org 7,500 USD
5139.com 1,071 USD
wasserheizung.de 1,500 EUR
internetmobile.com 2,500 EUR
helan.com 2,860 EUR
hotelhotel.com 11,500 EUR
flash.co.uk 2,100 GBP
xo.tv 2,550 USD
vikingauction.com 3,500 USD
butterfly.at 2,500 EUR
jjc.eu 1,000 USD
For more details check out www.sedo.com