Believe it or not... somebody topped this one.
Here.
His Hartsfields were
free. Now of course, this is assuming the price of the house wasn't adjusted for them.

According to the OP, the stuff was just "left behind" in his newly purchased house, so it does indeed sound like a freebie. On top of this, he got a stack of rare vintage McIntosh gear and a wonderful Thorens TT all left behind as well. I guess that one wins out... But #2 is nothing to sneeze at.