Fisher didn't actually play in the '76 final. He was the named substitute (only 1 sub allowed in those days of course), but wasn't brought on during the game. Having said that, he played a vital part in our Cup triumph that year. If it wasn't for his late equaliser against Villa in the 3rd round it would never have happened.
I always find it a bit sad when players put their medals up for sale. I hope it's not out of financial necessity.