I think the problems with amps is that to make any profit, you have to charge a lot more money than a US counterpart. Import duties, shipping, etc all do not favour Canadian vendors. I was looking for a darkvoice amp last year and saw how pricey there were to get here. I contacted the manufacturer who would have sold me about $5000 worth of amps, but for me to turn around and try and be competitive with Boyer, or any eBay vendor was basically impossible. So after figuring out the time it would consume to take orders and package and ship, it was not worth my while. I was not looking to make profit just to give Canadians accesss to similar products as Americans at a reasonable price.
Hopefully because you are much more of a complete business you can overcome this issue. AKG and Ultrasone and some of the other companies have exclusive distributors in Canada and do seem to like to share either.
I wish you guys the best of luck. Your banner ads are everywhere and I hope you are succesful!