DiTBho:
I do not care, but a warning must be given so you are aware of that: making a copy and selling the originals will likely be a copyright infringement. So would be publishing the copies.
From a person, who was archiving photos and some books, not electronics magazines with detailed schematics:
Don’t bother with a flatbed scanner unless you are going for physical 600dpi or higher and then making a very nice, aligned, high-quality package of that. Average photo camera nowadays with the ability to fix exposure and focus is likely to give you as good quality, in particular if you can evenly light the page. It will be faster too, if you can place it on a stable support and trigger from distance (aka bulb mode). The disadvantages: lens distortion and the need to build or obtain a fixture. The output will not look professional, but good enough for your own uses if you just want to just simply check something in the future.
If going for a scanner, check if there is no business around you with an offer to scan books. If it’s not too expensive to scan that amount of material, ask about a sample page and if the quality is good enough — use their services. 80 magazines will take ages and you may let other people do it. Be sure to scan some schematic with tiny letters and some photo to check if they are reproduced well. Sometimes they may also produce PDFs.
In either case skim over the copy before getting rid of the originals.
To give some example: see attachments. The upper part of “bookscan-sample.jpeg” is a scaled down version to see the overall image(1); the bottom two are of the actual size. The book was photograhed literally on my knee at about 10s/photo, two pages at once, in poor light conditions, at ISO-1600, with holding the camera in one shaky hand. The “me-0002.png” is a post-processed photo of a A4 page from a 1908 magazine. If the camera can zoom in at small distances, selected fragments can be copied at 1200dpi — you literally see halftone patterns.
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(1) Intentionally unreadable, as it’s not my purpose to give access to the content of the book.