Extremely nice IG

Let's just say, if I were to own an Instagram worth $400-$500 which has never been on the market.

Where would the best place to sell it be exactly? I know people on here be a little spooky at times...

What payment method should be used?

HackForums
It is easy to get lost over there, and lay low in there marketplace.
BTC or paypal cash card (make sure they give you a picture of the receipt)

The best possible place to sell it in my personally experiences and opinion is to sell it through Instagram itself, people will pay more money than anyone on any forum usually, that is just from my personal experience.