Totally!If you have to sell your gear, you are admitting you bought the wrong gear in the first place,
Though when you starting out, you don't usually know what you need. Or, you just outgrow your first few as you improve. That doesn't limit to ski gear either. Can be bike, boat, whatever...
As others suggested, I almost never sell in spring (or "end of season" in whatever activity). Not just for better pricing, but also because the "upgrade" happens at random time. So the unwanted item become available for sale also at random time too.