Age-old rug dealer wisdom: always check the back of a rug! The back will tell you more than the front. So, without paying much praise and keeping your cool, you kick the corner with your foot and take a quick glance at the back. For a silk Hereke or a Mohtashem Kashan, this simply means the knot count, how fine the rug is, and, consequently, how much it is worth. That's how the negotiation begins when a dealer is buying.