It's wrong to scam people.
Neal has a job selling vacuums door to door and is currently working.
Neal wants to sell lots of vacuums.
Neal is open and honest with everybody he tries to sell to and gives them the best deal he is allowed to.
Neal makes up tales to gain sympathy from prospective buyers and uses every other trick in the book including charging higher prices.
The customers of Neal's that day enjoy getting a bargain and are happy with their purchases.
The customers that Neal scams lose money they desperately need and their lives don't improve.