Amazing collection! Franklin and Lochte are gonna kill it and Wieber ought to be the favorite as well (too bad no Gabby Douglas in this product though!).
I have quite a few Olympic items on COMC and I just threw them up there with some, ahem, slightly inflated prices, lol. I have a feeling that right after the Opening Ceremonies might be a really good time to sell (when Olympic buzz is at its fever pitch), although it might be worth it to wait for the swimmers to get their first golds (they WILL get them) before listing.
Of course, I can't claim to be an expert and this is relatively uncharted territory in terms of the hobby itself. Whatever happens, good luck! You've got a mighty impressive collection