Audio Technica ATH-AD900X Sale $133 Reg $300; AD700X Sale $88 Reg $200; AD500X Sale $66 Reg $170

Audio Technica Open-Back Audiophile Headphones:
ATH-AD900X Sale $133 Reg $300;
https://www.amazon.com/Technica-A…rds=ath-ad
AD700X Sale $88 Reg $200;
https://www.amazon.com/Audio-Tech…rds=ath-ad
AD500X Sale $66 Reg $170
https://www.amazon.com/Technica-AUD-ATHAD500X-Audiophile-Headphones/dp/B009S333U4/ref=sr_1_3?ie=UTF8&qid=1501773388&sr=8-3&keywords=ath-ad?