I mentioned because there's been a used analyzer (this older model in your photo) listed on Ebay for quite some time at $1000 and the seller has even offered a discount down to $800. My research on it indicates that the sensors need replaced over time so the cost of that and a calibration kit would bring the price up closer to $2000. That's better than the cost of a new one but still a lot for the typical hobbyist, though I can see the value for professionals such as yourself.