As far as I can tell, Sea Buff is just toothpaste. Why pay $8-10 for a $1-2 dollar item.
I wouldn't want to brush my teeth with Sea Buff? My local shop sells it for $4.95 and they gave me my last bottle when I bought a mask so didn't cost me anything been using that one for about three years now. Whatever floats your boat the way I look at it if it costs less than a Mocha I'm not looking for a cheaper option that may not work.