Yes, the 1960s were a magical time, when wild animals were sold in comic books. Where were they getting all these monkeys and raccoons from anyway? Do we want to know? Is there a connection with the fact that the spider monkey is today on the endangered species list? Surely not -- it says right on the ad: "Live delivery guaranteed." These were clearly professionals when it came to cramming monkeys into cardboard mailing tubes.
Also, notice that the monkey is advertised as eating the same food as humans and "even likes lollipops." This is why most houses in the 60s smelled strongly of raccoons and monkey diarrhea.