Ravelry is a very good website for bartering knitting stuff you aren't going to use. Many moons ago I accidentally bought a lonely skein of sock yarn. Not enough to do anything with, really. So, I listed it on my Trade/Sell page on Ravelry.
Memoe33 took me up on it and sent me this in trade!
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I especially like these stitch markers:
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and a closup of the pattern tamers (cause I can)
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So I got a skein of yarn outta my stash that I had no idea what to do with, and got these lovely items that I can actually use. That's a WIN in my book!