I bought 3 pairs of NOS Giro Haviks on ebay for $25 each -which I consider score of the year. They originally retailed for $150 (back in 2010? 2011?), have awesome Zeiss lenses, and are designed to fit helmeted heads. I don't know why Giro stopped making them...

That said, I just can't justify spending a lot for glasses no matter how awesome the lenses are. Super clear, optically pure yadda yadda yadda only counts for *clean* lenses. After a few miles, when the lenses get all sweaty.....