I would say if the price is right for sure. The rift S is a sidegrade to the CV1.... sure it has better resolution and less screen door effect, but it drops the OLED screen, has no physical IPD adjustment and controller tracking is not as good as a 3 sensor CV1 set up (try playing sports bar VR on it or some bow and arrow games)
but make sure you check the cable which runs from the headset to your pc. it is proprietary , and no longer made any more. Some try to sell the cable alone for well over £100 and if it breaks your rift is a door stop. I am happy with my CV1 and hoping it will last long enough to take me through to the next VR generation.
ohh if you decide NOT to go for it, also check out the oculus quest.... in some ways it is better than RiftS and in some ways worse, but it is worth consideration.