I've noticed that they have shelves that are rated at different weights but I was wondering, if I can get a shelf that supports a higher weight for not much more, is there any reason not to get one? Any rack shelves suggested? Any used shelves I can obtain? I'm looking to spend little money on these shelves as all they are are shelves! I believe I have a Netshelter AR1000a 42U rack, it's white so I'm not sure if I should look for some white shelves instead of the jet black I see.

Place or site where I can find refurb/used shelves? Cause I don't see the need for a new one.