At the moment, has Sennheiser HD600 reduced to $249.19 Edit: Also $249 at headphones.com Thanks to Rhodey for pointing that out. See his provided link below.
Lightweight aluminum voice coils ensure excellent transient response Neodymium ferrous magnets maintain optimum sensitivity and excellent dynamics
Sennheiser HD600 HI-Fi Headphones
Best Value Headphone - The HEADPHONE Community
Sennheiser HD 600 – Thomann United States
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Just bought the Sennheiser HD 600, my first open-backs. : r/headphones
Best Value Headphone - The HEADPHONE Community
PSA: Sennheiser HD 600 Headphones $249-299 on , HD 6XX $199 on Drop
Sennheiser HD 600 over-ear open-back Headphone - Official Thread - Official Headphone Model Discussion - The HEADPHONE Community
Sennheiser HD 600 over-ear open-back Headphone - Official Thread - Official Headphone Model Discussion - The HEADPHONE Community
Sennheiser Over-the-Ear Stereo Headphones Black HD 600 - Best Buy
Sennheiser HD 600 over-ear open-back Headphone - Official Thread - Official Headphone Model Discussion - The HEADPHONE Community
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Sennheiser HD 600 over-ear open-back Headphone - Official Thread - Official Headphone Model Discussion - The HEADPHONE Community
Sennheiser - HD 600 - The Source AV