I have gone through this with an other dealer who is located in Ontario, I am in BC. take a look at this,
I often buy online from Alberta and Ontario and specifically look for the PST savings by doing so. I also know many others that do the same. I am sure this helps online business do more business, seeing that your registered in BC I understand that you need to charge and remit PST, but I believe you don't need to.
Businesses in Canada but Outside BC
You must register to collect and remit PST if you are located outside BC (see Location of Your Business below) but within Canada and
regularly do all of the following:
-sell taxable goods to customers in BC
-accept purchase orders (including by telephone, mail, email or Internet) for taxable goods from customers located in BC
-deliver taxable goods to a location in BC, (this includes goods you ship physically or electronically, even if you deliver the goods through a third party, such as a courier)
-solicit persons in BC (through advertising or other means, including mail, email, fax, newspaper or the Internet) for orders to purchase taxable goods
I I don't think you solicit sales in BC
Have a look at the bulletin this was taken from:
http://www.sbr.gov.bc.ca/documents_library/bulletins/pst_001.pdf
Just saying, may work in your favor, as it may for other vendors who don't collect PST
Phil