I have a blue Sony MZ-R55 available. It comes with a new 1450mAh internal battery, the original remote control, toslink optical cable, a non standard (very small) multi volt charger (set at 3v) and the Sony pouch soft case. I lost the original headphones but replaced them with a pair of 1More in-ear headphones that originally cost me £35. I still have the 1More headphones box that contains 3 unused pairs of different size rubber covers.
I have not used it in 5 ( ish ) years so I will need to charge it up and check that it all still works.
If all is well, £60 posted.
Now checked and it charges up and works as intended.