Product review (5 stars): It's a... used lint filter.
In a way, I cannot believe I'm writing a review on this item.  This is after all just what the item lists it as: 8565972 DRYER LINT FILTER WHIRLPOOL MAYTAG USED PART.

OK, with that said, it was exactly (EXACTLY) what I needed.  It cost about one seventh what a new one would cost.  (I still get a twitch when I looked up the cost of a new one...) It came quickly, was in perfect order, just the best darn filter I've ever bought.  Also the only drier filter I've ever bought, but still, I recommend the item and the seller.