Everyone knows my boss - what's your point?

I understand as a consumer you would want to get the best price for things, but just don't like how some people approach it. 

A customer I haven't seen before (mind you I work everyday and been there a long time) walks into the pharmacy asking for assistance with blood pressure machines. I spend a good 10min explaining to him the differences and my recommendations. 

In the end this is what he says: "I know Michael (my boss)."

My response: "Great. A lot of people know Michael too." 

He didn't say anything and he said he'll think about it and walked off.

Yeh what's your point bringing out my boss' name. You want a discount, you'll have to come in when my boss is here. Random customers thinking they're bum-chums with the boss (which in most cases my boss don't even know them) and expects a discount.

If I don't know you, then you are not a regular customer.