Why do you want to know what everyone else has? Just stock up to the best of your ability and you should be fine.
Asking to see peoples "stockpile" is kind of like asking to see pics of someones alarms system at home. Some people wont mind but the majority of us like to keep that a secret plus it will tent to scare people off because they dont know you or know why you want too see pics of their stockpile. The best advice I can give you is to just buy what you can afford but be sure to distribute your funds between ammo, weapons, food and water evenly. all the ammo in the world wont help you if you are dying of thirst or hunger.