big FB groups?

hello,

So i would just like to know if you guys know in what niche are the facebook groups the biggest? I want groups where stuff is being advertised and sold such as cars with 10k+ members in each group.

Do those kind of groups exist for any other niche rather than cars?

Buy/Sell/Swap pages are my go to groups. They're almost always niche oriented (longboarding, computer hardware, house furniture, cars, mountain/road bikes etc.) and they're full of people motivated to purchase products in their niche. Just go on facebook and search "(Your niche) marketplace" or "(Your niche) buy/sell/swap"