Sales and contracts

Is Salary from a Gambling Sponsor Halal?
Paying and Collecting Taxes and Customs
Buying Pirated Software, Permissible?
A Bus Driver Stops to Perform Prayer
Trading of pig meat (pork)
Buying and selling in the Masjid
Selling food to disbelievers during Ramaḍān
Swapping of goods
Swapping of cars with the payment for difference
Selling fish that are in the water
Trading Currency Online
Determining the Price of Artful Things, Islamic View
Renting space for Alcohol