In Western countries , the average retail price is $ 1,000 \/ Â # 500 \/ â 700 per pound ( US$ 2200 \/ Â # 1100 \/ â 1550 per kilogram ) . In Western countries , the average retail price is $ 1,000 \/ Â # 500 \/ â 700 per pound ( US$ 2,200 \/ Â # 1,100 \/ â 1,550 per kilogram ) .