All of these inflation bags are fully functional but they have some defects. 
Defect #1 : the "handles" inside the top of the bag are broken (in some cases just one is broken).  It doesn't significantly affect the performance but it can be a turn off to our packraft renters so we've decided to sell them. 
Defect #2: small holes inside the inflation bag.  Holes are 1/2" or smaller and not more than 10 (most have far fewer). Obviously there is a small amount of air loss but these ones should operate at 95% the effeciency rate of a new one.  Unless othewise noted the handles on this type are not broken.  
Either way great way to save $20 vs a new one!