The following list can now be added to and edited here (link is external)
larger farm type items, hydraulics, transmissions, wheels,bearings www.surpluscenter.com www.northerntool.com applied industrial
warehouse supply, shop tools, etc www.mcmaster.com www.Grainger.com www.msc-direct.com www.harborfreight.com craigslist
smaller mechanical parts www.smallparts.com www.wmberg.com www.sdp-si.com
electromechanical american science and surplus (link is external) www.allelectronics.com
electronics www.adafruit.com www.sparkfun.com
Fasteners fastenal
If you have additional suppliers please add to the list in this forum
Amazon and e-bay are often good places to look too.
Yay! Nice icon.
nice list, also dumpsters and local hardware stores. ;)
-dan
imwutieet
If you have the space to store materials, older implements at auctions go for $50-300 each in my area, full of thousands of pounds of quality steel, fasteners, U-bolts, and hydraulics.