Price History Of White Ace Album Supplements?

Hello,
I was wondering if anyone has a brief history on the pricing of White Ace pages over the years. I came across some blank pages for Israel and there is a 1.25 written on the envelopes. I can only assume that at one point these were in some sort of retail environment. But 1.25 seems really cheap. The pages are old, they seemed to have yellowed a tad (or maybe that was the color of the paper in the early 70s??? The envelope is an older style. Anyway I was just curious if anyone had a history on pricing

thank you