Condition plays a significant role in determining the value of a vintage Pyrex measuring cup. The presence of scratches, chips, or cloudiness from wear can significantly reduce its worth. Cups that retain their original color and clarity, particularly those with minimal signs of use, fetch higher prices in the resale market. For this reason, many collectors take great care to preserve their vintage Pyrex measuring cups, displaying them prominently in their kitchens or glass cabinets.