Yep, gold mine for sure.... I would say the best outlet for that kind of stuff is Ebay for sure. I have done very well on old fashion related items on there from time to time. Those sample catalogs could bring big money, who knows... personally I think at least a hundred each, but you never know about an auction. could be 20 bucks, could be couple hundred....
any documentation with the photos will bring the prices up as well, as you know. I would say the least valuable would be the clippings, but if they are tied in with either the photos or swatch books, it wouldnt hurt to bundle them in as well.