My first cookbook was whatever was the current edition at that time of The Settlement Cookbook. My mother gave it to me when I married. I later inherited her dilapidated copy ( I think a 1938) that had been given to her by her sister-in-law when my parents married.
I'm sure mine came with a dust jacket. But somewhere along the way, it disappeared. And at some point, I guess the cover of the book sustained damage. Way back then I must have thought it was a nifty to idea to cover it myself. I used the shelf paper that I had lining my cupboards. Certainly a unique copy.
Recently I purchased a very nice copy with a dj from the 1940s.
As for buying old cookbooks, I do it routinely, even though my NY resolution is to stop. I buy many of my books on eBay but caution novices that it can be a minefield. You really have to check out the seller, ask questions, and request proper packaging. Sometimes, in spite of all that, the book arrives either not as described or damaged during shipping -- or both. Oh, and if you prefer your books not smell like an ashtray, ALWAYS ask about tobacco (and musty) odors before bidding.
Sometimes I actually find better prices (no bidding wars) and service on book sites like abebooks.com, biblio.com, as well as several others. Amazon (their independent sellers) often has a good selection of older cookbooks. I do use alibris also but bristle a bit at their including tax.
The other sites absorb that cost.