This person calls every day wanting to speak with the owner. Most of the time the owner isn't even in the office so when I tell this person that the owner isn't here the caller simple replies "Oh, thats okay. I'll just see if I can get him on his cell phone". The strange thing is that very few people have the owners cell phone number. Since this person keeps calling every day I have wrote the number down from the caller ID and have given it to the owner. Of course he doesn't know the number. I'm thinking its only a matter of time until this sales person tells me that they perhaps lost the owners cell number and would like for me to give it to them, which I will not. This must be some sort of new sales strategy.

keeps calling... asks for owner, I say I am her and he says "[***]!" and hangs up.  What is this all about?