As a reinforcement/counterpoint to that above...I took risks on buying vintage Italian frames from Italy’s eBay and have been pretty successful.

Basso Gap, Rossin Record, Rossin Performance EL, Van Tuyl from the Netherlands, Faggin (not so successful), Losa...

id put Rossin and Basso against any of the more established brands...but there are other fun Italian brands which are pretty quaint! Denti, Somec, Galmozzi, Grandis, Viner, Bevilaqua...