What is the ruling on the bonus that pharmaceutical companies give to pharmacies?

Ruling on collecting stamps and trading in them

It is not valid to sell something for an unknown price or for a price to be paid within an unknown period of time

Ruling on taking pictures with digital cameras and video cameras

He is an agent for a company and he sells goods for a price higher than that of the company and keeps the extra amount

Can he sell computer programs even though he is afraid that they may be used for haraam purposes?

Is it permissible to make a cake to give to a child on his birthday without having a party?

Selling something that is not in your possession

Ruling on pig bones and making use of them

Ruling on buying tickets for sports games and concerts then selling them for a higher price