Old/cheap copies of ASHRAE 90.1;SMACNA GUIDES

[DonJ]

Where can I find discounted copies of the following:
ASHRAE Energy Code 90.1
SMACNA Duct Design Guide
ASHRAE Fundamentals Handbook

Even 1996 - 2001 editions are acceptable.

Thanks

 

[TD2K]

Try

http://www.half.com

or Alibris for used books. Both sites do carry technical books though some are much more easier to track down than others.