It's a pretty common mistake that the VS (Varmint Synthetic) and the VSSF ( Varmint Synthetic Stainless Fluted) get called Sendero's. Just last month I bought my dad a nice little VSSF 223 and the seller had it advertised as a Sendero 223 also.
FWIW, to anyone looking for a tack driving 223, you needn't look any further that one of these. My dad took the one I got him and never even had to do any load work as it was cutting holes with the very first load he tried. These little buggers just flat shoot.
Great little rifle and best of luck on your sale, I can't imagine it'll last long.