My other source is books sales run by the Friends of
the <your town
here> Public Library. I try to hit the larger sales held in my area each
Unfortately there are very few good techncial books in the public
libaries round here, so they don't turn up very often in the book sales.
About 10 years ago ther were a lot being sold off, for very cheap prices.
Not specifically computer-related ones (although I got a few on things
like the Atari ST). I did get the ARRL Antenna handbook for 30p (say
$0.50), the Handbook of Mathematical Functions (Dover reprint) for 20p,
DeCarle's book on using the small lathe for 20p (I think), and so on.
Well worth that sort of money...
I certainly never pass a library sale without popping in and looking at
the books... Ditto a second-hand bookshop or charity shop (thrift store).
The latter's another good source. Over the years, I've found some genuine
antyique electrical books (meaning over 100 years old), original service
manuals for valve televisions, volumes of Radio and Television Servicing,
car workshop manuals (such as the Australian version of the Mini manual,
offical factory one, for 75p or the Rover P6 factory manual, somwhat
falling apart for 50p).
-tony