Hi
For what it's worth.I'm about to do the same thing.I was told by an ebay rep from customer outreach,that I needed to shut my Canadian store down and then re-open one at ebay.com I was informed that I would lose my store listings only..It has been reaffirmed by other store owners as well as the person I spoke to from ebay customer outreach that switching your store from ebay .ca to ebay.com will pay increased dividends.I as well was hoping there would be a way to do it w/o losing my current listings within my store.I guess not