The ruling on one who buys goods on installment and then sells them to another for cash at a price lower than the purchase price

The questioner:
Now we have a call from Muslat from Riyadh. Peace be upon you. And upon you be peace.

The Shaykh:
Peace be upon you. This is a word from the Shaykh, may Allah preserve you. Peace be upon you, O Shaykh. And upon you be peace.

The questioner:
Shaykh, I have a question, may you live long. It is about the sale of communication cards. Currently, there is a common method where, for example, I buy a batch of cards, say about fifty thousand cards or so, for a value of, say, thirty thousand riyals. I buy them on installment from the owner of the cards, and he extends the amount to me, say, to fifty thousand, while their cash value is thirty thousand. Then I sell them immediately; sometimes I may have to sell them at a loss of one thousand or two thousand riyals or so, on the basis that they are taken from me. I do not know what the ruling on this is, O Shaykh, may Allah preserve you.

The Shaykh:
What kind of cards, my brother?

The questioner:
Communication cards, just communication cards.

The Shaykh:
Communication.

The questioner:
Yes, prepaid communication cards, like the ones in the cards.

The Shaykh:
If they have benefit and you talk on them until they are used up, then they are considered money, because this...

The questioner:
I do not talk on them at all.

The Shaykh:
Something that has benefit, so there is no harm in buying it, and if you want to sell it, it is your property, so you may sell it as well. Yes.

The presenter:
Okay, may Allah reward you.