Best platform to get rid of extra pens?

I have quickly accumulated too many fountain pens, mechanical pencil leads and notebooks in the last 1-2 years. Mostly brand new and never used.

I'm wondering what would be the best platform in the US to get rid of the extra stationary? I heard eBay and Amazon charge very high fees like around 16% or more. On the other hand, shipping fees can take significant cut too. I wish to get rid of the extra stationary without significant loss from my original purchase price. Is it much better to sell locally at Facebook Marketplace?