Knocked on my door, "they were doing a job in the ...

Knocked on my door, "they were doing a job in the area" and they wanted to give me an estimate on my roof. I agreed and set up a time for the next day thinking it was going to be a 20 minute thing. Four hours later at the end of their pitch I needed to agree to their price or I would have to pay $6000 more if I didn't except before they left. Blind sided! didn't realize that it was a sales pitch . Wasted most of my day having two guys at my house That wouldn't leave until I understood that they were giving me an awesome deal and I excepted.