What makes me want to buy,as a consumer.

one of the main things that make me want to buy things are sales. when certain things i like, say a computer with high ram, or a type of game that i would enjoy playing, when they are on sell, i feel like i need to buy it as if i didn't, i would be at a lose. not buying something that is on sale that i want makes me feel stupid, as although i dont need it, i want to use it.