WhoDunnit, has a smaller market demand than BSD.
While I enjoy WD, some might find it repetitive after a short time, but it sure is fun!
BSD is in demand as a dark, shooters game, that is a challenge to master.
Theme, look, and game play, keeps this in demand.
Strangely, they sometimes can be similar in pricing.

You should buy what you like, and buy well, to preserve value, or say whats a few hundred bucks, to enjoy a game for
many months not worrying about price.

Desire, and Patience, often are at odds, so all of this and above is personal.

You also need to ask yourself, if you are like most of us here, what happens when you want to keep it, and add
the next one to your Lineup?

Equally, is whether you want to plug in, and expect a turnkey, no work needed game, or you want to get inside,
and wish to mess around with it.

Best bet regardless of title, is someone within your driving distance, a fellow collector, who has polished
his games up well to perform well, and a good pinsider will take care of you, respectfully.

Good Luck, Pinball Madness comes next!