Exactly, Used stuff should not cost the seller any tax as you already paid it.

I use Ebay for buying way more than selling. Their fees are absurd now + you get strange people on there who pay slow and leave no feedback ect.

If you sell stuff on CL, or the swap meets, for too cheap flippers or local hoarders grab it that is no good either. Lots of the local Mopar project cars and desirable parts are being held hostage by a handful of older guys who are waiting for the prices to keep going up so they can make $$$ later. They grab deals and then just put the stuff on the shelf until the price far exceeds what they paid for it.