Hello from sunny Perth Western Australia, I am doing the sad job of clearing my father in laws home. I found a portable radio cassette player that is a National RX-S40 DD. It is not in the original box but looks unused as the headset is still in the plastic packaging. I can't find anything much about them online. Are they of no interest or value? - if so I will donate it to the local charity shop rather than attempt to sell it. Thankyou for your time, Margaret