يبيعوا القرد وضحكوا عاللي شاريه

A Libyan proverb from www.libi.mobi


 يبيعوا القرد ويضحكوا عاللي شاريه
(yebi'u elqard wa yaDHaku 'ali sharihe)
Literal meaning: They sell the monkey and laugh at the buyer
Meaning: This is used in describing certain people who are known for deceiving others, a little like the American expression "selling a pig in a poke".

يد واحدة لا تصفق

I'm resorting to Wikiquote again. I wish that they would tell where the proverbs are from, so if  you know the origin of this proverb, comment below.

  يد واحدة لا تصفق
(yed wahida la tesfaq)
Literal meaning: One hand cannot clap.

Meaning: People should cooperate to get things done, as in the English proverb "Two heads are better than one."

يا واخدة القرد على ماله، يروح المال ويبقَى القرد على حاله

An Egyptian proverb courtesy of Cherine of the wonderful Wordreference forums

يا واخدة القرد على ماله، يروح المال ويبقَى القرد على حاله
Literal Meaning: If you marry a monkey for his money, the money can be lost, but the monkey will still be a monkey.
Meaning: Think twice about marrying an ugly person for his money.

This is my new favorite.