Those sound very cool! I have the reproduction of the Sabbath one from the CD version, and I had the Japanese version of Dark Side, though I stuck mine on the wall and then lost it...
I had a friend who worked at a record store (Amoeba in Berkeley, CA) - I had been given an old copy of George Harrison's All Things Must Pass LP set with the box, poster, everything. I asked how much it might be worth - he said only $20 or so! Apparently the only things that are worth tons of money (hundreds to thousands of dollars?) are original pressings of rare albums like the Beatles's butcher cover - stuff like that.
Keep those things, pass 'em on to your children or friends for investment down the line - in 50 years, who knows???