TxG, here is a comparison of costs I made when I first started on this. Note the price of the component products & how much is in each. And that is STILL a fraction of the cost of the ones you got. More important, note the fact that it's in TWO PARTS. I left an explanation of why that's critical to use of ClO2. I won't disturb any more until you inquire. I don't know why Jim C's price is set at that nor why it's only one part. I've never seen it sold like that & everyone who works with ClO2 that I know always makes it in real time with the droppers bottles. I have my make-at-home 35 second video I made for you too. So ask if wanted. Good luck. I hope all this helped. Please share what I sent you with anyone who is sick and has little $$, ok?