I can only see cosmetic blemishes. sugino 75 cranks are top quality, but who knows how they were treated by the owner...not me. you'd need to inspect the threads, tapers, teeth and look for cracks/fractures/dents/etc. in person to really know what you're buying.
I dont want to say they'll be fine and they end up being trashed...nor scare you away from a good deal. Check them out in person, if possible. That said, I've purchased many a used crankset and have had good luck.
Last edited by TimeTravel_0; 01-12-11 at 10:34 PM.