Vent about Salesmen

I really don't like salesmen.
Why?
Because they're oblivious, annoying, and most of all... THEY LIE BIG TIME!
So we were trying to sign up for Dish and 2 different retail stores called and offered 2 different prices.
Of course the first place, which had the higher price, kept saying that it's impossible for the other place to offer a lower price and argued with me for 10 mins trying to get me to go with them instead and insisted that the other place was lying about the lower rates.
and finally he ended by saying
"well, you'll see when you get your first bill"
does it sound like a threat to you?
What won't they do in order to get your business/money??
So if you're not aggressive like that, you'd end like "the death of a salesman."