That might be an option -- but remember, anything you add (particularly when you increase the image quality of the file) creates a storage and bandwidth issue (if not for the user, than for the source).

And this is still a fairly low-margin product -- the acquiring and the scanning will take time and cost money, and I'm not sure it would be seen as worth the investment for a feature that will, in all likelihood, not drive much in the way of additional sales.

A Week Ago Tuesday: My blog, where I never, ever write about comics (though I think I did, once or twice).