Thats craigslist, that happened to me atleast 10 times selling my last car. I also held it for 2 weeks for people. If they ask you to hold it, just ask for like 100 buck deposit if they dont wanna pay it move on, if so you get a free 100 to talk to them, fuck if they show up, you can just sell it to someone else and keep there 100!!! Cinergi told me to do that, it eliminates people quick. Just my 2 cents.