bought a car online from the Province of Quebec, we live in Alberta, cost was over 10,000 Canadian, was a great experience. Bought a quality diamond ring online, a few thousand, no problem whatsoever. Buy a lot of clothing online, and I intend to do some more browsing/shopping online today.
All of the experiences I listed we did not have any issues with, I find the only time there are problems are with those places like say those smaller social sites, they seem to change their tune every month or so. goes from a one time fee to a yearly fee without even notifying you. Have disputed a couple of charges from this type of site in the past and most times the funds were returned to my account, only one time it wasn't. It was $19.00 so I did not fret about it too much.
We did save a lot of money by buying the auto online and having it shipped here by train, around $4,000. We did check out several car dealers in Calgary and the online site had the best price, so we bought there.
As to the ring, that is a once in a lifetime purchase and we saved a lot of money on that one as well, of course we bought from an online jeweler that we had thoroughly researched, not Bob's back room wholesale joint. Checked out reviews on the company and all. Went ahead when we felt confident.