My brother owned one of those until just a couple of months ago. It had become worth so much he just couldn't justify not selling it. On slow fire, that thing was surprisingly accurate at very long distance and was just what the doctor ordered for washing machines, refrigerators, engine blocks, and the like.
While the BAR is considered obsolete, you could do a lot worse for a heavy weapon- like the later M-60, it had a reputation for "making things happen" when you opened fire with it.