I have a few that may be important / valuable, never had them valued though so i dont know how much they are worth...

hostchat.co.uk
hoststatus.net
my-server.info
registryuk.com
windows-ce.com (won in an ebay auction for £5)
webpurchase.net
securedspace.net
Yourhostsucks.co.uk
domain-control.co.uk

Thats just about alll the good ones i have that I can think of.
One of these days, ill put them on my server and actually create sites for them (as most just go to a holding page, or agccworld.co.uk)