Willing to pay a reasonable price for these two books:
400 ideas for design, vol 1 (1964, from "Electronics" magazine, by Hayden books)
400 ideas for design, vol 2 (1971, from "Electronics" magazine, by Hayden books)
I am not too picky on condition, but all pages must be present with readable text and diagrams.
I already have volume 3 and 4, from 1976 and 1980.
Just would like to complete the set for my research and pleasant bedtime reading!