the watch of a watch collector. Because of this, the investment value (ie resale value) is far more limited than a manual or automatic movement watch.
While it might not be something a watch collector would want to buy, that doesn't limit the resale market totally. There are people who don't care about whether its watch collector approved, they know its a Patek.
I've had Rolex's that retired & became nothing by scrap value. One was in brand new condition. So people thinking a Rolex only appreciates, not true. Have one now that is from the 60's. It's our travel watch, we don't care if someone steals it cause we guess its worth alot less than our good watches.