Dean,
Here is a link for the protection policy
http://pages.ebay.ca/ebaymotors/help/education/buying/purchase-protection.html
And, no, it does not have to be a scam. Most of those sales are legit but motor vehicles, being big ticket items, do attract scammers.
Recently bought BMW SUV's from a seller in the USA, whereas the vehicles were located in Ramallah/Palestine and from there I sent them to China - all legit.
Get the VIN (have the seller scan and email you a copy of the registration) and run it at carfax.com. Ask the seller for the "story" on the car and see if it matches the Carfax story.
If step 1 pans out have an accredited surveyor in Vancouver inspect the vehicle and run the reggie through the provincial, federal and ICBC (Insurance Corporation of British Columbia) databases.
Make sure the vehicle is homologized for the jurisdiction you intend to license it in.
Use common sense and if the seller balks in any way, walk. Legit sellers will go out or their way to prove their legitimacy as they are generally aware of buyer angst.
Good luck!
Bernie