Yes, I'll sell it. There's no point in keeping it, specially if, as has been recently confirmed, most Switch games will see performance increasings by just running on the Switch 2
https://x.com/GoNintendoTweet/status/1909286135731548243
By the wording of it, it's pretty clear that any game that had dynamic resolution, long loading times or an unstable framerate will most likely see improvements on Switch 2. Which would render the original Switch completely useless to me.