I just got a reply of my query to an ebay shop about the price of the filter. He said:
hello total for five shipped is 91.50 =75.00+16.50(ship)
total for one is 25.50 = 15.00 + 10.50(ship)
Seems that batch order is more economical. Assuming 5 orders and each cost US$18.3, or HK$143. Anybody interested?
