I have done the same myself. I now have 10 copies of this track on 6 different labels with several doubles. I nowadays only play the Australian pressing. The rest will have to go at some point.Well, it's rare for me! I paid more than a few dollars, and I'd buy it all over again if I saw another copy.
Like all 78's, the value is usually based on the condition of the record and that is difficult to determine if buying on-line. That is why sellers often have an audio file of the track and if clean, it will fetch a higher price. A lot of my cheap copies can only be played by a steel needle. Great for the kids to play with.