Want to keep this as mature as possible. Please no flaming, bringing out people and your experiences just to shame the person.

So, just wanted to know about people's opinion on giving a friend a favor, like for example: Selling them an item, extremely below the market, because they needed it for themselves and their personal use, only to have them to sell it for personal gain.

Please note, if this thread gets out of hand or any flaming goes on, I will lock/delete it immediately.