Questions in regards to a Facebook account?

I’m not sure we’re you guys are selling at on Facebook but say I post an ad on keystone Raceway parks selling group I list my price and location, write up the ad, post up LOTS of pictures, if I will ship or local pickup only, and when I finish I have an option of listing it in like 13 other groups I belong to. The list comes up and I’ll click the groups I want my ad listed on. Click click click and I’m done. Most have to be approved by a moderator in that group. I try to price things fairly as you get 80% of your action in the first 48 hours. In a week or so they will notify me asking if it’s sold, want to drop the price, re-list, or delete my ad. I don’t accept payment through Facebook or marketplace. I’ve sold 13000.00 race cars, mega block, balanced 512 assembly, heads, intakes, you name it. I even made 4-5 sales out of the country as they are on Facebook too. Don’t be an idiot and not list a price. Don’t be an idiot wanting 90% of what you paid for it or trust me you will get beat up over it. Lol