If you have a large enough pool that has sampled many cameras, you can probably pick up a trend by asking such questions.
Dear Brian,
Very true. But this is still not the original point. The original point is the camera
that is available to the inquirer.
On average, taking your concrete example, most might well agree that the Canon is the camera to go for. I certainly would.
But the range of samples available
to the inquirer is nothing like the range of samples available to
those who are answering his (or, very rarely, her) question.
The chance of getting a good or bad Leica, Canon, Minolta, whatever, is very nearly pure luck -- the more so as a camera that is being sold today is (be definition) likely to older than any camera of similar vintage that an RFF member has been using for a while. Also (by definition) someone is selling it, quite possibly because they are dissatisfied with it. That was my original point about 'If you get a good one'.
To try to restate my point yet another way, isn't it a good idea to find out all you can, about all the cameras you can, and then buy something (almost anything) because it comes up at a price you consider worthwhile, even if it means taking a chance on (say) a Minolta instead of a Canon? And isn't it a dubious idea to set your heart on one specific camera that you know little about, and try to find a good one?
There's always a gamble involved in buying second-hand cameras (and indeed, most other things). It just seems to me that generalizations
ABOUT VERY OLD CAMERAS (bold caps not for you but for others who have missed this bit) are a lot less useful than generalizations about more modern cameras
THAT HAVE NOT SUFFERED THE WEAR AND TEAR AND DUBIOUS REPAIRS OF SEVERAL DECADES. (Again, please don't take offence at the bold caps -- your reply shows that you have taken this on board, but there are apparently still some who haven't).
Cheers,
Roger