I actually bought a Wii U as a new system. That is the only one on the list that I owned as a new system. I did get a used Gamecube after the Wii launched. I've tried buying a couple of used Dreamcasts, but they both broke down very shortly after buying them. So, I don't count the Dreamcasts. Wii U was the least popular system that I've actually owned and got some decent playtime from.
curl-6 bet me that PS5 + X|S sales would reach 56m before year end 2023 and he was right.
My Bet With curl-6
My Threads:
Master Thread, Game of the Year/Decade
Switch Will Be #1 All Time
Zelda Will Outsell Mario (Achieved)
How Much Will MH Rise sell?
My Bet With Metallox