I saw a current one where you can trade in an original XBox One for $150 credit towards a Switch.
There's a bunch of others listed.. https://www.gamestop.com/trade
I'm not interested in a Switch, but I also want to sell my original One (now that I have a One X).. maybe a trade/cash for the Switch, then sell the NIB Switch? Are they even hard to find at this point? Haven't thought it through.
What's a used original (not launch, just original) One worth anyway? $100+, roughly?