Where can you get a Septum piercing cheap at 16?

It depends where you are.

I live in Perth, Western Australia.

I checked out two places before I got my Septum done, Piercing Places Fremantle was easiest to get to but had a cost of around $75 with jewllery.

Glamour, on the outskirts of Freo, offered the same thing at only $50, they alsO have one use needles. They are clean and know what they're doing, they did both my septum and navel with not a single complication in the year and a half I've had them.

I suggest exploring your area and checking prices cos it can save you alot of money in the long run.

Hope this helps xx