Proyo Yolsters were one of the coolest items to have back in the day.  Made of good plastic, these held either the regular shape or butterfly shape yoyo with a very good, tight grip and an integrated  belt clip.  While these were made by the thousands for the school program, not many exist today.  This version was most likely one of the units painted by students of the yoyo museum at the time and has a battle worn look to it.
 
One unit may be sold in the future but is currently unavailable for sale.  Please inquire with questions.
 
This is for the Gen 1 Aqua/Black Yolster.
 
•  Rare meter  • • • • • 5/5
•  Condition meter  • • • • • 5/5
•  Estimated Value $10 - 15