You will not find one on Ebay because the powermeter just came out last month. Plus, they didn't make enough. Excel Sports still has them on backordered since last month. I think www.all3sports.com still have them. That's where I got mine. Give them a call first. They don't actually build the powermeter wheel themselves, but from a custom builder in Cal. That may explain why their price is somewhat cheaper, relatively speaking. They even give you a free matching front wheel.