I've bought from both Rockauto and FCPgroton - and have not had to pay fees/brokerage when package arrived at my door (Vancouver BC). If you can find what you need at FCPgroton for similar prices, the shipping is cheaper. They use UPS World Ease, which includes taxes, brokerage and shipping. My last order of $287USD cost me $31 to ship - which is cheaper in taxes alone (12% here).
But Rockauto has great selection. And watch for their wholesale blowouts too. I bought a pair of Canadian-made Beck Arnley brake pads from Houston TEXAS for $5 plus shipping and it was still cheaper than buying it locally.