What is the ruling on buying from the kuffaar when there are Muslims around?

Does Islam permit bidding in auctions?

Discount on cost of laundry if one pays in advance

Is it permissible to sell to drunken customers?

Ruling on sales or offering discounts

Muslim renting his house to a non-Muslim

Is Paying in Installments Prohibited in Islam?

Reward for planting: who gets it and when does it end?

Transferring patients to a private hospital for examinations in return for a part of the fee

Raising the price of a piece of land in return for transferring a government loan to the purchaser