I agree Jeff, I'm a big fan of Ballester, I wish he had done more horror titles.
For some reason, I could only post 8 pics earlier. Here are some other posters bought in 2016: 3 UK quads by Tom Chantrell, one for Hammer (Lost Continent, 1968), one for Amicus (Land that Time Forgot, 1975), and a re-working of a Bernie Wrightson design for Creepshow (1982). Also, a French 23X32 for Flesh and the Fiends (1960), a US one-sheet for Nightmare on Elm Street (1984), and a US 3-sheet for Invaders from Mars (1953), all unbacked except that last one, which is linen-backed.