[NightBird]

I think this is one they added, or at least I didn't see it before:

Backteria and Other Improbable Tales Richard Matheson (SF/F short stories) $2.99

Product Description
Available only in ebook, BACKTERIA AND OTHER IMPROBABLE TALES is a brand new collection of 18 short tales of terror and the unknown from the master storyteller Richard Matheson. In the title story, published here for the first time, a research doctor encounters an exotic new strain of virus that causes the infected person to disappear. His curiosity leads the doctor on a path of discovery which takes him deep into his own personal history and suggests the age-old warning: Be careful what you wish for. In “Getting Together”, a case of mistaken identity leads to a darkly farcical story of a marriage, murder and a love that knows no bounds. The quietly threatening “Haircut” shows how a routine trim becomes a dark and terrifying experience when a barber is confronted with a sick customer who seems somehow otherworldly. In this collection of rarely available stories, Richard Matheson demonstrates once again why Ray Bradbury called him “one of the most important writers of the 20th Century” and Stephen King named him as “the author who influenced me most as a writer.”

Stories included (looks like there are actually 19):

Spoiler:

1. Backteria
2. He Wanted to Live
3. Life Size
4. Man with a Club
5. Professor Fritz and the Runaway House
6. Purge Among Peanuts
7. The Prisoner
8. The Last Blah in the ETC
9. Counterfeit Bills
10. 1984 1/2
11. Pride
12. Now Die in It
13. Leo Rising
14. Where There's a Will
15. Getting Together
16. Person to Person
17. CU: Mannix
18. Haircut
19. An Element Never Forgets