There are so many wonderful quote of his, these are just a few that I can remember.
"I've had a perfectly wonderful evening. But this wasn't it."- Groucho Marx
"Well, I thought my razor was dull until I heard his speech." - Groucho Marx
"The secret of life is honesty and fair dealing. If you can fake that, you've got it made." -Groucho Marx
"Anyone who says he can see through women is missing a lot." - Groucho Marx
"I don't care to belong to a club that accepts people like me as members." - Groucho Marx