About 3 years ago, I found and used an on-line bookstore that sold
secondhand books at very very low prices: many were less than 
a pound. The postage charged was also very low.
I wanted to use it again but after several searches on a number of 
search  engines,  I cannot find it.  I can only remember that it had 
'cheap' or  'low -cost' in its name (Not very helpful I know!).
I have come across a number of websites that sell secondhand/new 
books at  very low cost, or are much cheaper than most, e.g., 
The Bookdepository, Abebooks, etc, but none come close to the 
prices of the one that I used three years ago. I realize that 
it may of course have now closed down.

If anyone can offer any urls of really cheap online book sellers 
in the U.K., I would be very grateful.
Thanks
David