More impressive is how someone with 1077 of feedback bought it!!
hans
"Wanna buy a duck?" was Joe Penner's catchphrase.
You're probably thinking of Groucho's TV show when the duck would come down if
somebody said the "secret" word.
Penner died in 1941. If you're interested, you can Google him for more
info.
I've seen all Groucho's movies many times and he didn't use that line, it being
Joe Penner's catchphrase.
Joe Penner was a comedian back in the 30s.
Warner Brothers cartoons of the era had a character that used that line also.