The local Home Depot had 10-packs of Levitron jacks for $29 the last time I looked. After that the local Greybar branch was the best price, by a few cents.
I get patch cables (and other low-tech stuff) from
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Over almost 2 years I haven't seen a bad cable, yet.
Computer warehouse (cdw.com) phone sales force isn't what it used to be but they haven't totally pissed me off yet. OK if you know what you want.
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is good. I've been part of a project that got a pile of Cicso stuff from them recently and I just bought a Fluke meter. They had the best price.