Value of a 1954 David Bogen Record Player with Speaker?

I have a David Bogen 1954 model ET16 record player in a carrying case. It has a hookup for a microphone that screws in. This unit works great although I don't have a microphone for it. I can't find any information nor value guide or anything more than a schematic for it on the internet and was wondering what the value was for this? All the parts are original including the working needle.