ABC Golden Years

So, I went to an estate sale ran by this HORRIBLE COMPANY last Sunday in Berwyn, IL. Let me first start out by saying they price their items way too high! Oh, and the prices are written on the items with a black permanent marker. What idiots!
Now comes the good part.....
So, my mom purchased an office chair from one of the guys running the place and he told her that he'd bring the chair out to the front for her. Now, I get to the register and realize that this guy is way overcharging a friend of mine, so I offer a lower amount. That didn't go well to say the least.
Now its time for my mom to get her chair... The guy say "I'll open the door for you and you can carry it out." My mom said, "I thought you were going to bring it out for me?" He said "I never said that." Obviously he was taking my back and forth bargaining BS out on my mom.
My mom wasn't able to carry the chair, so I grabbed it. As I grabbed the chair from the TOP OF THE STAIRS! I said "you guys are real A-Holes" but, I said the whole word. Well, I guess the guy didn't appreciate that. He flew out the door and decided to start videotaping me on his cell phone.... Not only that, he followed me out of the building to the curb. He didn't go all the way to my car, but talk about harrassment!!! I decided to call the police on him after he continued to harassing me for an extreme amount of time. As I was calling the police he ran back in the building. Hmmm.....
The police said that since he filmed me outside, there was nothing they could do, but they did go inside and speak to him. Not sure what was said. At that point we left.
Now my only suggestion is, DO NOT ATTEND ANY OF THE ESTATE SALES RAN BY THESE CLOWNS, unless you want to be treated like crap and be harassed.