I have two of these beauties in almost identical condition.

Clean and clear, with some yellowing (a couple hours with a UV light will fix this!) The blades are snappy and clean, focus is buttery smooth.

Some of the finest "fast 50s" ever made.

Works great on micro four-thirds cameras like the Pansonic GF1 and Olympus ELP1.

$90/obo shipped and pp'd