Fair enough- its a question of scale for sure - if you can get the retail price down scale might increase but its got to be getting a return for your time and investment. $55 is not too bad but $21 (+P&P) would be a nice symbolic figure to try for and would provide strong resistance against copycat vendors. Beware of Chinese suppliers who will watch what you are doing and then under cut you with knock offs if they see any opportunity...this is a large part of the strategy by which they have come to dominate global supply chains... 'Country Driving' written by Peter Hessler is a book I strongly recommend for anyone interested in or involved in the Chinese economy especially if actively trading.