My advice is to stick with known brandnames and sources.

Some of my own favorite sites include:

http://www.campmor.com --general camping gear

http://www.cabelas.com --for many things, esp. clothing

http://www.equipped.org --for GREAT knives

http://www.countycomm.com --for paracord, signal mirror, cheap LED lights, misc fun stuff

http://www.basegear.com

http://www.bestglide.com/index.htm

http://www.kmmatchcase.com/ --world's finest matchcase

http://www.forestry-suppliers.com/ --compasses & other stuff

http://www.spectrumbagsonline.com/ --for orange garbage bags

http://www.wholesaleforeveryone.com/ --for bandanas