If it is a shield with good defense against ranged attacks your best bet is:
Members: Granite Shield
Non Members: Rune Kiteshield
saradomin shield
Antidragon shield
the second floor of runescape has a npc walking around with it talk to him he will hand you one.
Their are shield shops all over Runescape. You should be more specific.In North Falador near the fountain.
An elemental shield is 845 gp.
no
grand exchange
The best shield for a non member in stat wise is the Rune Kite shield however if you want rarity the You can go for one with a trim in the colour of the runescape gods.
If it is the shield that your gang had you can simply go back and get it. But if it was the other gangs shield you need to get someone to get you it.
You can buy one from the Grand Exchange or you can buy an Addy Square shield from the shield shop in Falador
Yes. You just simply go back to where you found the shield and get it.
Get 60k for a adament berserker shield and get 200k for a rune one.