Everyone is different, but a CZ 75B is pretty nice looking to me. If it shoots nice, I would be inclined to keep it. The problem with trade-ins is that you generally get low balled on the trade-in.
i bought a CZ 75B in the first part of 2020. it is blued (or black to me). i had the chance to buy the all SS the store had, but as i told the salesman, im wasn't trying to impress anyone with that. it only cost "about" $300 more than the black one. now of course the SS is not made anymore, and i have seen NIB for sale at like triple the MSRP pricing, which makes me say, (wished i had gotten one)
they are solid guns, shoot incredibly well, and recoil is just not an issue, over a polymer/metal say for Glock.
they have thier issues, like any other gun, like spring replacements at xxxx number of rounds, or until they break.
like anything else too, with a hammer fired gun, the CZ's really don't like to be dry fired, with out a snap-cap.
the firing pin roll pin, has a nasty habit of crushing, due to the hammering with out a cartridge or snap cap.
it "can be" an easy fix, if you inspect that roll pin for crushness. (look thru the roll pin when it is in the slide) otherwise, wait too long, and it's a trip to the gunsmith
Cajun Gun Works, sells replacement roll pins, stronger than the factory for cheap. (i have at least 2 on hand, as well as at least 2 trigger springs) for that "just in case i need it time....all parts are dirt cheap.