I'm browsing Facebook marketplace and where do people get their prices from?! These aren't scammers, these are people who are active in other Facebook groups and have sold other things that aren't a crazy price.
1.) A VRX 1/10 nitro buggy ($200 brand new) and a quart of Traxxas TopFuel

that's listed as a "Losi racing buggy" for $850...
2.) There's another post with 4 cars. 3 of which are old 1/18 Chinese cars, one of which is in two pieces and the other is a very well used 1/10 redcat volcano... all brushed. $850.
3.) Countless other posts of roached out Traxxas vehicles and people want retail price for them.
Better hop on those killer deals before I do guys! Do people really fall for that stuff?? I mean seriously, who in their right mind would see a Traxxas maxx for $650 that looks like its lived in the bottom of a lake for a year and go, "that's a really good deal and I need to hop on that right now!" The best part is the descriptions... it'll be practically brand new and they won't know ANYTHING about it. Like how do YOU not know what YOU bought it for 2 months ago?!?! Like you bought it NEW and are asking 5x what you paid for it?