Amazon has made a new category called microconsoles, probably for all the Mini consoles and the like. Problem is, those are not in that category, what you're going to find there are mostly gaming accessories...
https://www.amazon.com/Best-Sellers-Video-Games-Microconsoles/zgbs/videogames/19497043011/ref=zg_bs_nav_vg_1_vg
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454 List as Google Doc: https://docs.google.com/spreadsheets/d/1aW2hXQT1TheElVS7z-F3pP-7nbqdrDqWNTxl6JoJWBY/edit?usp=sharing
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/
Free Pc Games thread: https://gamrconnect.vgchartz.com/thread/248138/free-pc-games/1/