Someone here had a link for s/p skins for the SDS100 a while back that I looked at. Didn't think I needed them. Worst screen ever for easy mar and scratch is the TRX-1. A tablet screen protector would be what you needed for the SDS200, if you think you need one. I could see if I were toting the scanner around everyday getting in and out of a car, etc. But, as a base station at my desk? Nah, I wouldn't want anything to take away from the crispness of that display.
Word of caution . There is a seller selling sds200 screen protectors for $10.00 per protector on the bay . Inflation !!! Anyone can buy something like I posted with attached link and make one yourself .