The caller is selling herbicides. I actually bought 2 gallons of the stuff a few years ago. The story is that they will break a 5 gallon container to sell you 1 gallon jugs. He called back a few months later to know when I wanted my other 3 gallons. he became irate when I said I didn't agree to that and refused. He called me several times demanding that I accept the shipment, which I refused. Finally, I had to hang up on him several times. This must have been before caller I.D. I had another sales call from them on January 28,2009. I listened to the same sales call and refused. By the way, I might as well have poured water on the places where I tried to kill the vegetation with this junk. It is supposed to be diluted, but I couldn't tell it killed anything poured on straight. The caller also told my wife, who answered the phone, that he was calling from Houston, TX (we live in Texas), and that it was not a sales call. The number was actually from Appalachia, VA.