Now that I have a decent scanner, I'm planning to scan all the original covers in my library

However, not only will this take a long time to do physically, but there will be a delay in sharing most of them as well. I'm doing my new scans at 1200 dpi & 48 bits per pixel. That's a lot of visual information in the first place, but also I can't save 48-bit jpegs. They've gotta be PNG or some other non-lossy format. This yields scans that are typically close to 500 megabytes! Even the generous space allowed by my free Mediafire account won't be able to handle all that. So, unless I happen to have somebody's request, these will be waiting for me to convert them to JPEG in batches, possibly after some basic color adjustment.
The majority of these scans will end up being duplicates, but one thing I've noticed is an issue here is that raws tend to disappear. That's a problem when you want to make a cover for a different case format, or when the skills and standards (and tools) of the community improve. I figure the more raw sources we have floating around, the better.