@lucy_farmer wrote:

Though I do agree with you that AI will (eventually) get good enough to pick out and clamp-down on psuedo-private sellers who sell loads and loads of *new* things, loads of *similar* things and loads of consumables (which are logically impossible to be 2nd hand) 


Consumables don't need to be in 2nd hand condition to qualify as a genuine private sale.

For example my dad's printer broke so he bought a newer model and I sold his incompatible unused ink cartridge in new condition. These things happen but doesn't make it a business.

Similarly it's possible to make a business out of trading used items.