I picked the following up at a Heritage Auction:
Heinlein, Robert A. Assignment in Eternity. Fantasy Press, 1953. First edition hardback, first state Currey A binding (brick red cloth, with six gilt bands on spine, and with “Heinlein” 3mm high), a Fine copy in a Fine dust jacket.
I started fairly late to acquire a complete collection of Robert A. Heinlein in first edition, but I’m working on it…