I started collecting my cookbooks back in the late 70s, when they would have those huge book sales at school (they had 4 or 5 semi trucks show up, and set up an entire corridor with tables of used books!) and paperback books were 10-25¢ for those little pocketbooks, and maybe a dollar for a large one. Hardbacks were 1 or 2 dollars (remember, the new prices of many of those large books were 10-12 dollars then!). That was also when I got hooked on cooking, and I learned to look closely to make sure I wasn't getting those books that were calling for using things like a can of tomato soup (though I always liked tomato soups), or many other canned things, as I was trying to cook from scratch, to save money, and I quickly learned it tasted better!
One of the early books I got back then (I think for $1.25) was
The Complete Book Of Breads, by Bernard Clayton Jr., which I think had a copyright date of 1973, but this looked unused. That's when I got hooked on baking, and I still make a bunch of those recipes, esp. the rye breads - all those things I could get at the co-op helped out, too.
There used to be a book store in the area - Atlantic Book Sore - that had incredible prices on new books, plus a used section. I never left that place without buying something!
I pretty much stopped buying, but I really have to build another bookcase.
