I bought all of these in the past two weeks:
Rec (2007)
Zombieland (2009)
The Haunting (1999)- I rebought it because my VHS tape was eaten by the player.
Jeepers Creepers (2001)- rebought (I had it on VHS and I am working on replacing my VHS with DVDs or Blu Rays)
Deathdream (1974)
The Sixth Sense (1999)- rebought (DVD replacement) Also, my VHS was VERY worn.
Halloween 4 Special Divimax Edition- rebought (DVD replacement)
Halloween 5 Special Divimax Edition- rebought (DVD replacement)
Waxwork/Waxwork II: Lost in Time (double feature)
Insidious (2011)
The Exorcist III (1990)
Daughters of Darkness (1971) (Two-disc Special Edition)
Texas Chainsaw Massacre (2003)- rebought (DVD replacement)
I Know What You Did Last Summer (1997)- rebought (DVD replacement)
Day of the Dead (1985) (Divimax Edition)
High Tension (2004) (Unrated Widescreen Edition)
Grindhouse Presents, Planet Terror - Extended and Unrated (Two-Disc Special Edition) (2007)
Grindhouse Presents, Death Proof - Extended and Unrated (Two-Disc Special Edition) (2007)
Basket Case (20th Anniversary Special Edition) (1982)
The Stepford Wives (1975)- Used Like new
30 Days of Night (2008)
Cube (1997)
Shutter (2004)

I upgraded and bought Near Dark on blu-ray. There's no extras so I kept the DVDs in the same case - the best of both worlds!

City of the Living Dead
Torso
Reincarnation
Land of the Dead

DVD

Texas Chainsaw Massacre: The Beginning
The Prowler
Hancock

Blu Ray

Masters of the Universe
Domino

Here are all the horror films I have acquired since the last time I updated:

Note: DVD replacement means I had the film on VHS, but decided to replace it on DVD.

Christine (special edition)- I had it on VHS, but I decided to replace it with a DVD version (plus it is special edition)
Evil Dead (2013)
The Evil Dead (1981)- DVD replacement
Book of Shadows- Blair Witch 2
Dog Soldiers
City of the Living Dead (special edition)
Near Dark
House of 1000 Corpses
Poltergeist- DVD replacement
Repulsion (The Criterion Collection)
From Dusk Till Dawn (Dimension Collector's Series)
Cannibal Holocaust 25th Anniversary Collector's Edition (1980)
Ghost Ship (2001)- replaced my heavily scratched up disc
The Orphanage
Shaun of the Dead
Satan Hates You
Fright Night (1985)- DVD replacement
Halloween: The Curse of Michael Myers- DVD replacement
Cloverfield
The Visitation (2006)
Stir of Echoes

Night of The Hunter
The Thing From Another World
Close Encounters of The Third Kind
Dead Silence

Those are some pretty good movies there. I have been wanting to buy the Criterion Collection copy of Night of the Hunter.

Unfortunately thats not the one i got but it was cheap.

Took yet another plunge into B&N's 50%-off Criterion sale:

Repo Man
Marketa Lazarova
Jean Vigo set
Gate of Hell
Simon of the Desert

and finally snagged Dogtooth on DVD, as it was also on sale.

I have added quite a number of horror movies to my collection since the last time I updated (from pawnshops and such). Here are all the films that I have bought:

Note: DVD replacement means I had the film on VHS, but decided to replace it on DVD.

2001 Maniacs (with Robert Englund)
Aliens Versus Predator: Requiem (Unrated)
The Amityville Horror (2005)
Bug (2006)
Carnivore (2000)
Constantine
The Eye (the 2008 American version)
The Grudge (the 2004 American version)
The Grudge 2 (unrated director's cut)(the 2006 sequel to the American version of The Grudge)
Hollow Man (special edition)- DVD replacement
Hatchet (Unrated Director's Cut)
Hatchet II
Jekyll (2008?)
My Bloody Valentine 3-D (2009)
Prom Night (2009)
Pulse (2006)
Quarantine (2008)
The Ring two
The Silence of the Lambs (special edition)- DVD replacement
Storm of the Century (1999)
White Noise
The Wolfman (2010)
They Live (collector's edition)(1988)
The Devil's Rejects (Two-Disc Unrated Director's Cut)(2005)
Feast Three-Pack (It includes, separately packaged, Feast (2006) and its two sequels. Feast is the unrated edition, while the sequels are the rated editions)
The House by the Cemetery (special edition)(1981)
Saw II- Unrated (Two-Disc Special Edition)
Maniac (30th Anniversary Edition)(1980)
M (The Criterion Collection)(1931)
Cabin Fever
The Fall of the House of Usher/The Pit and the Pendulum (Midnite Movies Double Feature) (1960)