Islam. I live for it: November 2013

Bismillah.

Volume 3, Book 34, Number 294:

Narrated Abu Said (radiallaahu `anhu):

We used to be given mixed dates (from the booty) and used to sell (barter) two Sas of those dates) for one Sa (of good dates). The Prophet (sallallaahu `alayhi wasallam) said (to us), "No (bartering of) two Sas for one Sa nor two Dirhams for one Dirham is permissible", (as that is a kind of usury).

Bilaal (may Allaah be pleased with him) brought some good dates to the Prophet (peace and blessings of Allaah be upon him) and he said to him: “Where did these come from?” Bilaal said: “We had some bad dates and I paid two saa’s of them for a saa’ so that the Prophet (peace and blessings of Allaah be upon him) might have some of it.” The Messenger of Allaah (peace and blessings of Allaah be upon him) said: “Oh! Do not do that, (it is) the essence of riba, the essence of riba.” Narrated by al-Bukhaari, 3212.

The Messenger (peace and blessings of Allaah be upon him) stated that giving more when equal amounts should be exchanged because of the difference in quality is the essence of riba, and it is not permissible to do that. But the Messenger of Allaah (peace and blessings of Allaah be upon him), as was his wont, pointed out the permissible way. The Prophet (peace and blessings of Allaah be upon him) told him to sell the bad dates for money (dirhams) and then buy the good dates with the money.

Taken from: http://ilookilisten.wordpress.com/2013/11/19/exchanging-goods-the-golden-rule-hadith-no-1789/

Bismillah.

Volume 3, Book 34, Number 293:

Narrated Hakim bin Hizam (radiallaahu `anhu):

Allah's Apostle (sallallaahu `alayhi wasallam) said, "The seller and the buyer have the right to keep or return goods as long as they have not parted or till they part; and if both the parties spoke the truth and described the defects and qualities (of the goods), then they would be blessed in their transaction, and if they told lies or hid something, then the blessings of their transaction would be lost."

The seller must disclose any faults in the item which may make it less desirable and reduce its price. There is abundant shar’i evidence to this effect. It was narrated that Wahb ibn ‘Aamir (may Allaah be pleased with him) said: I heard the Prophet (peace and blessings of Allaah be upon him) say: “The Muslim is the brother of (another) Muslim. It is not permissible for a Muslim to sell something to his brother in which there is a fault without disclosing it to him.” Narrated by Ahmad and Abu Dawood; classed as saheeh by al-Albaani in Irwa’ al-Ghaleel (1321).

And it was narrated from Abu Hurayrah (may Allaah have mercy on him) that the Prophet (peace and blessings of Allaah be upon him) passed by a man who was selling some foodstuff. He put his hand in it and found that it was wet. He said: “Whoever deceives us is not one of us.” Narrated by Muslim (101).

I know for a fact that very little people do this. If someone's out to sell his product, he'd like to hide the defects knowingly in order to get a bigger price than its worth. Only a believer would do this because he knows that these few extra bucks won't do him much good if he lost Allah's pleasure because of his unfair dealing.
Jannah is your real business. Strive to crack that deal. ;)

Taken from: http://ilookilisten.wordpress.com/2013/11/07/fair-dealing-hadith-no-1788/