Sony WM-A39 Walkman

A Sony WM-A39 walkman was used in Ghostbusters 2 to play "Higher and Higher" in order to excite the slime blown inside the Statue of Liberty and get it to walk. The WM-A39 was released in 1988 and initially sold for $55 which puts it in the midrange of the models available that year. The A39 was only released in the US though a nearly identical version, the WM-B39 was marketed to the UK the same year. The picture below is of the "B39", both models seem to be fairly hard to come by these days. Screencap: