Justdan, I'm from Canada and I believe this system wouldn't be very useful for Canadians. There simply isn't enough people to warrant the need. If Audiogon is at it, then it would be nice to see it, but it would just be icing on the cake!
Capability to Search for Local Used Equipment
I think it would be great if Audiogon provided search capability based on location. I would like to type in my zip code and find out what's for sale within a 50/100 mile radius of my location. I just sent an e-mail to Audiogon with this suggestion, and they replied that they would consider it. If more people request this, maybe they'll do it.