While I agree with you and understand the whole "buying on-line" deal, I use search criteria that closer match what I'm looking for, and am not disappointed, I.E. "did 520 o-ring chain" "did 520 X-ring chain" "did VX chain" ETC. or something with the brand that you are looking for, it helps weed out the crap. Try it, you won't be disappointed.
desertR