Anchor Bay B1G1
Great Anchor Bay sale that's been going on (looks like it may end tonight/today so hurry), similar sale going on at Amazon but starting prices are much lower at DD, this one is a really good deal:
The Bava Box 1 & 2 Retails around $99 for both using code BOTH set's are $30.38 ($45 currently with Amazon B1G1)

Set One includes 6DVDs:
The Mario Bava Collection, Volume 1 (Black Sunday / Black Sabbath / The Girl Who Knew Too Much / Kill Baby Kill / Knives of the Avenger) (1964)

Set Two includes 6DVDs:
LISA AND THE DEVIL, HOUSE OF EXORCISM, BAY OF BLOOD, KIDNAPPED, ROY COLT AND WINCHESTER JACK (a Western), 5 DOLLS FOR AN AUGUST MOON, and FOUR TIMES THAT NIGHT

Bava Box
Bava Amazon Link
Also checkout both seasons of Masters of Horror for around $50 after B1G1.
Use code:B1G1ABDH0809 at checkout if needed.