Ted Nelson’s Junk Mail (and the Archive Corps Pilot)
ascii.textfiles.com
ascii.textfiles.com
If you go to just one or two trade shows a year and talk to people during "unsociable hours" you've just saved yourself a year of reading ads. Especially the niche-companies are low on staff and usually volunteer their knowledgable geeks for the graveyard shifts at trade shows and if you have a good standing with them stuff is virtually free.