Everyone does it and if you don't, you end up losing. I remember when I was looking for international computer scrap, people start flagging me. It is really frustrating, but I know exactly why they did it. I was offering a way higher price than any of them were. I mean I wasn't offering Ewasted prices, but still two times what they were offering. Anyways my point is that if you start flagging be prepared for them to start flagging you as well.