I tried to text you at the number in your posting. I will buy the whole lot for $50.
Reorganizing my dust collection and these need to go, everything in great shape.
Rockler Ceiling Track System with two hooks. Two 4 ft tracks. Very helpful for small shops, more info here:
4 inch Woodriver clear dust pipe, two 3ft sections
4in to 2.25in reducer
$50 for everything, or let me know if you would like a specific piece