I bought mine from Citicall.
I bought mine for 5280 HKD. I went to all the usual suspects, Man Shing, Win Shing, Tin Cheung. The cheapest I got quoted was 5200 HKD @ Echo Photo @ Tsim Sha Tsui, but they did not have stock.
Figured 5280HKD was pretty good and if you take my exchange rate...