boxbid.com
boxbids.com

serverbid.com
serverbids.com

$20 for singular/plural pair. $30 for all four names and I'll throw in:

25hosts.com
30hosts.com
40hosts.com
50hosts.com

I was planning to use these for a reverse webhosting auction site, but got sidetracked. If interested, email me at rick@slavemedia.com.