If you're emailing HKSupplies for prices, try
sales@hksupplies.com instead of forum PM or ebay ask a question.
Also, as you can appreciate - English is not their native language, so keep your questions simple and to the point, eg. How much is x item delivered to Australia? Instead of long paragraphs saying you're tossing up between x and y lens, what are the pro's and con's of each, what is availability like, which one has better bokeh, etc. The latter
styles of questions tends to get ignored as they don't tend to generate a sale (in the eyes of the vendor). Be aware of the difference in business practices of HK too - they tend to be straightforward cash for goods transactions, not a retailing experience to remember (for better or worse).
Don't take that negatively, HKSupplies ship high volumes of goods daily and ebay/retail sales account for only about 20% of their revenue.
Also if you buy from HKSupplies direct (using the email above) instead of via their ebay store, they may be able to give you a better price (minus ebay fees).
I'm a walking banner for them. Because I truly believe they offer superior service to their competitors.