New OBi200 for $37 on eBay and Newegg:
https://www.ebay.com/itm/383365507592 (https://www.ebay.com/itm/383365507592)
https://www.newegg.com/polycom-2200-4952-001-accessories/p/N82E16833617015 (https://www.newegg.com/polycom-2200-4952-001-accessories/p/N82E16833617015)