if you haven't seen pictures and they say its a purple and yellow 97 gti, they might be mistaken and have a 97 purple and yellow gts, which is the old 3-seater hull with a 718. if you've seen pictures and its a later style hull and says gti on it, the seller might be mistaken which year ski they have. BUT - usually when folks are mistaken on the years, they think its newer than it is, not the other way around.