I wouldn’t bother trying to sell it, especially if it is a non-S model. You’ll be lucky to get $50 for those just by trading them in.
Now that you have it, you might as well make the most of it considering how little you would get to get rid of it. The thing is, the Xbox One is pretty versatile and does a lot for a console, even though it doesn’t really excel at anything. I’d look into what you could use it for as a media box with all the apps on there by now. Also, the backwards compatibility could be nice to use if that’s up your alley. And while it doesn’t have a great lineup of exclusives, you would be able to get plenty of games for pretty cheap at this point, plus the traditional Microsoft wheelhouse of Forza/Halo/Gears is still pretty good if you’re into any of those. Sunset Overdrive is really worth playing too, although the humor and style are way overdone.
Hate to sound like a salesperson, but since you’re already in this situation where you have it and you gain little by getting rid if it, I’d do some research and thinking on what you could use it for. Even if it’s just one good thing, that’s better than nothing, and there’s probably something it has or does that you don’t know about.