Looks like quite a smattering of replacement parts. Make sure the stress cracks in the crank aren't too bad and that you think they can be filed out. Then if the frame is dent free with no serious rust purchase it unless he is asking more than $600, then make a careful survey of the components to make sure it is worth it. Those crank is in decent shape are easily worth $200 and the frame probably $400 plus. Gios Super Records are highly coveted with a strong following. It's in my top 10.