Speaking of the 3.4, I once had one and if memory serves it was very nice, especially for its vintage. Someone, I think here on RFF but maybe not, made a passing reference to the 3.4 not being that great, maybe even a dog in their opinion.
Is this lens perceived, rightly or wrongly, to not be a great performer? Not that I'm in the market, but if I ever found one again at a decent price, at the right moment, I wouldn't hesitate to grab it unless I had information that it wasn't worth it.