I know a some sites like MFG.com result in far too many quotes. They can also make it really hard to the suppliers to filter relevant leads. I know a lot of people that get good business from MFG.com, but they all then turn around and outsource that business somewhere cheaper. I don't know too many actual job shops that are using it. The company has been growing like crazy though. Backed by Jeff Bezos from Amazon.
David Stewart said:
Mfg.com seems to generate a lot of negative buzz. Are there tar pits in online quoting services?
One web site that I have used is Alibaba.com, but of course like anything else you just have to be extra careful. Perhaps one alternative is Mfg Reps who know the suppliers appearing and offering their products in that site.