If the leather bracelet is authentic and unused, it's worth close to $100 - if the watch is unused, it's worth $300+ - I guess with the box etc. - they could sell on auction for $300-$600
I once had an unused Quartz, black dial, in-demand looks, unused strap, nice original buckle - sold only for $400-ish 🙁 But I didn't test it before selling, so if you are going to sell, test it first