This 1978 Breyer manual was a good find!
It was marked $2 at The House with Lions in Covington, Indiana.The lady came way down on another piece, so I offered her $4 for it (a fair price, in my opinion.)
Leslie and I used to sit and pore over these manuals for hours, circling the pieces we wanted and dreaming of adding them to our herds.
Frankly, I was surprised to find one, and in such good shape, too.
I am not sure if I have one of these in my manuals collection - one of my plans are to go through all those things and organize them now that I am retired.