I have The land of Painted Caves, but I am looking for:

• 1.1 The Clan of the Cave Bear
• 1.2 The Valley of Horses
• 1.3 The Mammoth Hunters
• 1.4 The Plains of Passage
• 1.5 The Shelters of Stone

I'll do 2 for 1 on the first 4.  The first two are unpostable, but don't have pages falling out or anything.  Just a lot of wear and tear and one of them appears to be wavy, possibly from water damage.  Hard to tell.  If you order the 2 on my shelf, just send me a PM stating you'd like the two unpostables.  

Clan of the Cave Bear - unpostable
The Valley of Horses - unpostable
The Mammoth Hunters - on my shelf
The Plains of Passage - on my shelf