technics pcm ex 70

I have a technics pcm ex 70 and im wondering if anybody knows how much i could sell it for as havn't a clue on what it is worth.I got it from my Auntie and its just sitting here as know one knows how to play so wish to sell so some one can use it as its a shame to let it sit here and not to be used. It all works and there is a Digital Disk Recorder / SY-FD5 with it as well