Atari Mega 4 With Monitor and Keyboard

Hi there,

I was just wondering if any of you Atari experts would be able to help me out? I have two Atari Mega 4 models along with the original Monitor and Keyboard (all in original box) that I am looking to sell soon. They have been used in a recording studio environment and we have owned them from new. Everything works as it should, and they come with Sound Cards (though I don't know which model)

I was wondering if anyone could give me a ballpark estimate of what they may be worth. I do not have pictures just yet.  They are sligtly yellowed after all these years (nothing excessive) but have been kept in good condition.

Thanks in advance for your help