Although qtb.com is currently in development as a financial trading book store (see Quality Trading Books), offers are being accepted for ownership of this valuable LLL.com domain name.
All top-level extensions with this letter combination are now long gone, registered several years ago.
This domain was first registered in May 1998 and has not been dropped since.
The dot net and dot org equivalents were registered in the year 2000.
Other taken domains include: (date of regisitration in brackets)
qtb.eu (May 2006)
qtb.co.uk (September 1999)
qtb.org.uk (August 2005)
qtb.biz (August 2002)
qtb.info (January 2002)
qtb.mobi (October 2006)
qtb.uk.com (June 2005)
Offers in the region of $xx,xxx will be considered.
This listing may be removed at any time depending on the success of the book store.
To enquire about gaining the registration of qtb.com please either leave a comment on this blog (this will not be shown to the public) or send an email to the address below:

Due to the rapid rise in the value of LLL.com domain names, it may well be advisable to offer early if you have any interest in gaining ownership of this letter combination.
Thanks for your interest,
Ben Catt
…
Update 30/06/08:
Some similar domains sold recently
(all data courtesy of the excellent NameBio.com):
13th June 2008, qhi.com, $13,500
11th June 2008, qli.com, $10,600
4th June 2008, qtn.com, $40,000
29th May 2008, qwa.com, $9,784
5th March 2008, qwc.com, $7,501
4th March 2008, qud.com, $18,500
14th January 2008, qzq.com, $19,110
27th November 2007, qee.com, $10,882
25th October 2007, qsw.com, $6,100
20th September 2007, qsd.com, $12,000
15th April 2007, qdz.com, $4,000
23rd January 2007, qir.com, $10,100