Yard Sale Find - Sizzlers Set and extras

At a community yard sale today and found a Speed Racer/ Racer X Sizzlers race track set for $15.  When I got home and opened it up I found it contained the original track plus four additional straight track sections which doubles the length.  Then at the bottom of the box there was an old Indoor Drag Track playset from 1981 and a vintage Speed dial house for Orange track.  Good day.