Certainly.
All you have to do is not bid on items that have this in the listing.
Customs services and international tracking provided
These words tell you that the seller is enrolled in the GSP.
Unfortunately, in eBay' usual kackhanded way, the words do not appear if you are shopping on a mobile, nor do they show if you Search using Gallery View.
Global Shipping is only available to US and UK sellers , so if you avoid those, by shopping Canadian (or French or Australian or Chinese or Rumanian) you will only be subject to Canada's duty and sales taxes plus Canada Post's $10 service charge on your doorstep before the purchase will be turned over to you. And then only on items valued over $20.
If you think $20 is too low, and compares poorly with the $200 in imports that cross-border shoppers are allowed, the person to address is
The Right Honourable Stephen Harper, PC, MP
House of Commons
OTTAWA ON K1A 0A6
Bonus! You don't even have to stamp the envelope. Just put OHMS where the stamp usually goes.