The link says the reserve price wasn't met, which means the seller has no responsibility to sell the item. Email him one more time and ask for a paypal refund.
Aquabid is different from Evilbay - transactions are not handled through the website. In the future, let the seller send you an invoice before sending them money.
Thanks, I assumed it worked on a similar basis as to "evilbay" lol...lesson learned xD