Is Amazon the only non-RingConn purchase channel in US?

I finally decided to go with the RingConn over Oura and would like to get it now without having to wait 2 weeks for shipping from the official RingConn website. Is Amazon the only channel for ordering in the US? I thought I could get it on BestBuy but don't see it on there. I hate giving Jeff Bezos my money so I'm looking for another way to buy. Separately, if Amazon *is* the only other purchase option, is it worth getting the 2 year warranty? I tend to be hard on my hands and it seems like a smart investment, but just wonder what all of your experiences have been.