We did this last year, and it worked out pretty well. Welcome to the 2013 Pay it Forward thread.
How it works:
First, follow me on Twitter for creating this thread. Just as a little thank you as it makes me look better. The link is in my signature. :)
You list something you have FOR FREE. In true spirit, you should cover shipping costs, but you can ask the "buyer" to cover them if you choose.
If you pick a free item up, you MUST list an item of your own. And so on and so forth. If you have an item you want to get rid of, you can post it right away and claim something down the road. But this is all done on the honor system. This lets us all exchange items that we don't need for something that is of use.
And, if you put up 3 items, go ahead and claim 3 items.
It doesn't have to just be triathlon gear related. If you have a video game that you never played or something else, you might as well post it up.
I'll use this post to clarify other things as issues may arise.