I have consistently found eBay/Froogle as good source from small sized supplies. This varies from drip pans, CO and smoke alarms. For large appliances such as Range, Habitat for Humanity is an excellent resource.

Home Depot/Hughes and Lowes are good for only few things. Home Depot is better for large volume. I have also been getting quotes from Sears commercial but deals are not that good.

For pest control, I have ordered supplies from
http://www.kill-fireants.com/restaurants.htm. in part because they have excellent information on what to use when.

Has anyone looked at B2B exchanges like Alibaba.com? Are they any good? Yesterday, I asked for quote on refrigerators. I am waiting to see their response. Can people post their experiences with suppliers in terms of price and quality of products?