Those computer shoppers got up to 800+ pages. The March 1993 issue I just glanced at was 873 pages. You have to be pretty motivated to scan those.
I started scanning magazines I had (mostly VG&CE and Commodore magazines) back near the turn of the century. It was a pretty slow process because I was doing it non-destructively using a flatbed scanner. But I also didn't do any post processing. If I got the whole page, it was readable and mostly straight, I was happy. I was never involved in any organized effort and once others started doing it better and faster I was happy to let that personal project go.
Doing these posts gives me an excuse to look through these old magazines, many of which I never had. Doing a post on an 800+ page issue of Computer Shopper should be fun...
Early on, I just scanned the content pages and not the ads because I was only interested in the content (and ads usually carried over from month to month or mag to mag). I would scan the ad once and just slip it in when I saw it used in another issue. Some got mad because that is not the ad from that issue so I lost a lot of interest at that pettiness.
I was using a flat bed scanner too. I was dropping over 30+ hours a month on this type of thing and spending around $100 a month buying issues I didn't have and no one had preserved yet.
That was before I got into it hardcore and shortly after that, life got in the way of putting that much effort into a hobby so I stopped and moved over to promotion and working on deals with publishers. I was able to broker a couple video games like this over the years as well (and probably turned a few game owners into penny pinchers wanting money for a 30+ year old NES game they didn't even know they owned).
I cannot wait to see what you put together to showcase a Computer Shopper issue. That should be interesting as there is so much in each issue.