For sale is: WALKER EQUIPMENT PLANTRONICS HEARING AID-COMPATIBLE HANDSET PHONE W13-500 90020P.  It is brand new in the original box (opened only for the auction picture.)  Offers will be entertained.  Shipping cost varies depending on where you live.  
My reference- yellow building, box 213, listed on 9-25-23.   One in box 232, listed on 10--28-23.