[JohnnyP]

I used to read Mad Magazine, back in the day (’64 ish).

In one issue, they did a spoof of mail order ads in the back of magazines:

So you see a cluttered page, with a small add for a genuine German Luger, with firing pin removed for safety.

Then another small add on the same page, offering genuine firing pins for German Lugers.

[PROCON]

Good grief, I read MAD magazine in the same era, had a subscription, great humor.

Also from that era I remember in the back of comic books you could buy all sorts of cool stuff including 'ingredients' to make M-80's and other dangerous fireworks, fun times! (Yeah I still have all of my fingers).