Living in non-USA (Canada) what sucks about online shopping is having stuff shipped across the border, paying duty and brokerage fees, having to wait while stuf

Living in non-USA (Canada) what sucks about online shopping is having stuff shipped across the border, paying duty and brokerage fees, having to wait while stuff is stuck in customs. I often shop at Canadian sites (even though it costs more) or at the few sites where they actually handle the border crossing. I would love a site that would aggregate these types of sites.