Don't let anyone ever tell you that collecting movie memorabilia is a waste of time. Hold onto that action figure, lobby card, or poster long enough and it some day may be worth more than the house you grew up in. Case in point a poster for the The Black Cat, that 1934 film adaptation of Edgar Allen Poe's classic story starring Boris Karloff and Bela Lugosi directed by Edgar G. Ulmer, which was recently opened for bidding by the Heritage Auction Galleries before closing on a final price of $334,600.

Yes, that comma is in the right place. Why'd it sell for such a high price? Because it is the only known Style B, one-sheet poster for The Black Cat known in existence. Auction Central News explains:

"The graphically spectacular red, black and white stone lithograph Black Cat movie poster is that rare collectible that transcends its genre," said Grey Smith, director of Vintage Movie Posters at Heritage. "Yes, it's a gorgeous movie poster, but it also carries great appeal as a piece of art, as a piece of pop culture and as an important piece of cinematic history. There's no other movie poster like it in the world, as far as we know, and it's worth every cent paid for it."

If The Black Cat's number doesn't drop your jaw enough as it is, this isn't the first horror movie poster to fetch such a heavenly bounty. The man who owned The Black Cat also once owned a poster for another Boris Karloff film, The Mummy. It's sales price? A whopping $453,500, which ACN notes is in league with a Bride of Frankenstein poster that sold for a similar sum a few years ago.

Oh, and if you're wondering what the most expensive movie poster ever sold was, that honor belongs to Fritz Lange's Metropolis. Back in 2005 the sci-fi one sheet, one of only three originals known to have survived the ravages of time, sold for a staggering $690,000 to a private collector; which is a number I can barely wrap my head around. Just makes me wonder what kind of kingly return I'll get on all these Rob Zombie's Halloween II posters I've been stockpiling in another seventy years...