Here’s our ergonomic video review of the day. Check out “Microsoft Ergonomic Keyboard 4000 Quick Retro Review.” You can get the Microsoft Ergonomic Keyboard 4000 for about $40. These have been around long enough that you may see them for next to nothing at second-hand stores or on Craigslist. I checked on http://www.searchcraigslist.org/ (searches all Craigslist from one form) and found a couple of pages of results for this keyboard.
This is not on our list of the Best Ergonomic Keyboards 2018, but is worth a look if you can grab one for a few bucks.
See video comments at YouTube.