Sennheiser HD1 Wireless In-Ear Headphones $85 AC at Newegg
Newegg.com has the Sennheiser HD1 Bluetooth 4.1 In-Ear Wireless Headphones (Black, HD1 M2 IEBT) for $84.95 with free shipping when you apply coupon code EMCSTWVT2 at online checkout.
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Sennheiser PXC 550 Bluetooth Headphones (Open Box) $150 at eBay
eBay with BLINQ has the Sennheiser PXC 550 Bluetooth Headphones (Open Box) for $149.99 with free shipping.