Boiler Room is one of my favs. Even though Glengarry Glen Ross was relatively boring, I like this line:

"It takes brass balls to sell real estate."

Then he turns around and he is holding brass balls. A-B-C is the best pitch ever in a movie, after greed is good of course.

If you want a great example of how to deal with rejection, come to Haight Ashbury and watch the homeless people ask for change. Sometimes if they have a good enough pitch, I'll give them a dollar. There was one guy giving "bad advice" and he told me to give him my credit card and to have unprotected sex with an intravenous drug user.

I gave him a dollar.