I bought them a while ago on amazon.com for $20 (shipped to Blaine). They are still $20 on Amazon.
I just looked them up for you and currently the
MEElectronics website has them the cheapest at $36 (shipping included) if you don't have an American mailbox. I would buy them again even at that price. They also come with a wide range of ear tips so you can find your optimal fit.