Good one.

Usually what I find at garage sales are glued in, punched and in general poor condition. Church sales and flea markets, the vendors, break up the books and try to sell for higher prices. I guess they like carrying boxes and boxes of cards around? I'm cheap and unless it's something I want, Casino cards are $3-5 Max. Exception would be anything Real Photo.

These came from an auction, where the bidding was high and competitive, some dealers and people who run shops. After that battle settled, (the real photo and anything with casinos gone) there were the lesser cards, in book after book, and the usual. "any book for..." bidding. When that died down, I bid $20 for choice and took the two largest books left. (some science right - volume not quality)

Round numbers 450 cards. Half of one was military bases, before world war I. Then the Philippians, hotels, nothing of interest to card collectors that I know of. Haven't worked on those. The big book with 395 cards was almost all holidays, Easter, Christmas, New Years, Thanksgiving and Valentines day.

Because of the age, all of these are out of copyright, so could be used for source materials for composites or derivative works.

Or maybe I paid $20 for this one Old Milwaukee card and got the other 99 for free?