Secondipity on eBay has certified refurbished Sony XM4 for $159.99 after taking 20% off using coupon code TAKETWENTYCR, shipping is free.
(coupon may be available to certain eBay account so YMMV)
Comes with a 2 year warranty included, 30 days return.
https://www.ebay.com/itm/Sony-WH-…id=711-127