I would like to trade for a set of nice vintage cranks in 172.5 length, either something related to the Suntour group (think Superbe, SR Royal, or Sugino Super Mighty) or Campagnolo, hopefully with the correct length/taper spindle.
I have two nice 170mm cranksets to offer that are just a wee bit short for my legs: a set of mirror-finish Sugino AS cranks with 52-42 rings, and a first gen Dura Ace set with 52-39 rings. Both have been used but are in very good condition, rings have plenty of life left, worst wear is that some of the outer layer of chrome has come off one of the DA dustcaps. Pictures:
I have other trade goods besides cranks too, just ask.