Cost is still great to me - I don't think a lot of people realize you dilute it with water making it last longer. I got my jug from ProExotics. I've seen it cheaper other places, but they did the nicest thing for me that they'll have my business forever. I guess they visit a lot of the forums I do (I believe it was mostly Kingsnake), and after I used it for awhile I began recommending the Virosan and their company (along with their tempgun) to people and they saw it. So they sent me some samples of Virosan for free! That's great customer service, and even though I've seen it cheaper elsewhere I will continue to buy from them because it's obvious they treat people right.