In my oppinion 600$ it's not expensive for the Trident unit if you really need that and if this device will work how they say. I wonder what will be the running price for this unit if we think about regents and calibrations solutions. Alkatronic it's from far more expensive, the running cost here in Norway it's about 200$ per year and deal only with Alk. Plus i don't reed best review about this unit. My point it's that i concern more about quality and running cost that the initial price...If we really need i think we can save this 600$ to buy it, but i also believe that will be close to 1000 in US and more expensive here in Europe..I'm surprised that it isn't much more than $600. I was expecting it to be in the $1k+ range.