The reasons can be varied and can be multiple and include: color, engraving gone wrong, labeling done wrong, surface skuffs/dings, pin distances less then 1" from Pin to CG and pin distance greater then 5.5" from Pin to CG.
New NIB Motiv Evoke Hysteria Bowling Ball | 1st Quality (12lb thru 16lb)
Storm Hy-Road X Bowling Ball 1st Quality | 15 Pounds | 3-3.5" Pin | 3.08oz TW
Storm Hy-Road Max Bowling Ball 1st Quality | 15 Pounds | 3.5-4" Pin | 3.08oz TW
Storm Electrify G/O Bowling Ball 1st Quality | 15 Pounds | 3-3.5" Pin 2.61oz TW
Storm Electrify G/O Bowling Ball 1st Quality | 15 Pounds | 2.5-3" Pin 2.64oz TW
Storm Hy-road Pearl Bowling Ball 1st Quality | 15 Pounds | 3.5-4" Pin | 2.77ozTW