I don't think many folks will even consider their medium / high value Switch games to sell / trade to GS. Their offer is horrible. Some will. Most will not.
Indeed...and it's not just Switch games they rip you off on with trades. I tried trading in my completed Nioh 2 PS4 copy to GS a coupla months after release. 12 lousy bucks in Regular TIV...12! Cool, no worries...I sold it on EBAY for the same price GS is selling it for used, $39.99.
Unless they're adding an extra $5 that week in TIV to lessen the shock, I find it's usually a bad idea to trade in at GS. I'll occasionally find a decent trade-in value there (before Covid-19 hit, I think I could still get $17 for Dying Light: The Following, a 4-year-old game), but those seem to be exceptions, rather than the rule.