Character ShopSave

I'm making a character shop for my game, I'm new to this so i was wondering if there is a more efficient way to do this,I'm trying to save the character availability so when they close the game it saves whether its available or not.. My shop works fine, I used playerprefs to have a int be a certain number but if its not then the bool is false

 if(Number = 1){
 //character Available
 }

, but I'm using multiple bools which is very inefficient, does anyone know a better way to make it so when the player buys a character it becomes available.