Sennheiser MOMENTUM 4 Headphones Black (Certified Refurbished) @ Sennheiser Hearing UK

Update: 6 more stock added.

Cheapest I've seen, direct from official Sennheiser eBay store, undercuts their own site.

“Sennheiser refurbished products are items that come from returns and therefore show minimal marks of use. All our products are strictly controlled, checked and refurbished for resale. You can return our outlet items within 30 days free of charge. Also, all items come with our 2-year warranty.”

Sennheiser MOMENTUM 4 Wireless Headphones deliver an effortlessly smart user experience wherever you go. With its outstanding sound quality and its all-new design that perfectly combines exceptional comfort and streamlined style, nothing can get in the way of your listening pleasure. Enjoy great music quality all-day long thanks to Sennheiser Signature Sound, enabled by the headphones' audiophile-inspired 42mm transducer system and aptX Adaptive. Access the Sennheiser Smart Control App and customize the sound to your individual listening preferences with the built-in EQ, presets, sound modes and Sound Personalization feature. The headset's Adaptive Noise Cancellation ensures you won't be distracted when you want to immerse yourself in your music, and the versatile Transparency Mode lets you hear your surroundings without removing the headphones. But that's not all. Four noise-canceling microphones provide high-quality voice pick-up and automatic wind suppression for optimized calls and easier access to voice assistants (Siri and Google Assistant).