I apologize for late reply. Sorfeh or Surfeh, a flat-woven cloth for making, eating, and storing bread, is small (3’ x 3’) or (3’ x 9’) Kilim format rugs that used by nomadic and tribal people in Iran like Afshar, Bakhtiari, Shahsavan, Qashqai, Baluch or Luri. The Sorfeh usually have zigzag motifs and penetrating two sides of a plain, madder red or camelhair field. The borders are frequently of soumak or knotted work, and these delicate techniques perfectly complement the plain ground. It is very hard to find authenticate real Sorfeh especially antique ones. The real ones they end up in high-end gallery in Europe or the US. The other place in Iran that you may find some original antique Sorfeh is street name Manochari that is center of all the antique dealers. The price is depend on the coloration and the age and how customer looks like.
If you are interested to have Sorfeh from Iran. I will be asking our office in TEHRAN to start looking for it. The Square Sorfeh known as RoKorusi (Top of Koursi in FARSI). Koursi is cubic box shape made of wood that people used to warm their houses or tents. They put hot red charcoal under it. They cover the Koursi with cotton or wool cover to keep the heat. On the top of Koursi they lay down a square rug format Soufreh. Are the people use Koursi, probably? However, It is hard to find Authenticate Sorfeh “square shape”. I hope I addressed all of your questions properly. Please feel free to contact me if you have any question.