To share or not to share your deals

I get so excited by pricematching or just getting a good deal that I assume everyone else does too, but evidently they don't.  Often I find myself talking to strangers at Walmart in line but maybe it should end there. Should I share my deal at the expense of looking like a kook? This weekend at Walmart in front of the milk I waited while a man grabbed 2 gallons of milk when I grabbed mine I mentioned that the milk was $3.19 at CVS he looked at me as if I was trying to sell him something. Like CVS had paid me to stand there. The more I said to explain the concept of price matching the more he and his wife exchanged this-lady-is-crazy looks until finally I found myself walking backwards towards my then screaming twins. Maybe I'll keep my deals to myself and maybe not everyone wants to save OVER $1 on milk???