What's the difference between a used car salesman and a software salesmen?
Only the used car salesemen knows when he lying.

How do salespeople traditionally greet each other?
"Hi. Nice to meet you. I'm better than you."

How can you tell when a salesperson is lying?
His lips are moving

Salesman calling up prospective client: : "Is the boss in?"
New office assistant: "Are you a salesman, bill collector or a friend of his?"
Salesman, thinking quickly: " All Three!"
Office boy, smelling the ploy: " In that case, he's in a business conference. He's out of town. Step in and see him!:

Salesman: " This computer will cut your workload by 50%."
Office manager: "That's great, I'll take two of them!"