north american 7 transistor radio phonograph

I'm curious if anyone knows anything about this portable phonograph I have - I can't find anything about it. I know it's from the 70's, I've had it since I was a kid. It ran on three "c" batteries. I'm interested in value and saleabilty.

Here in Australia they sell well, but only for about the same as their original cost, which here was $20.