In our culture selling real estate can give you 2 options to earn. You can be paid a commission for the sale or a property or you can earn from the mark up that you had padded the selling price. When a relative asked me to sell his lot he gave me a fixed price. An agent who had a buyer approached me and said that we can increase the price. And so we did by adding a mark up of 50,000 pesos (that's about $1,000). When the property was sold I got my share of 25,000 pesos and the owner gave me a tip of 5,000 pesos.