I put up stuff to sell on Facebbok sometimes and you get all these messages about people interested in the item and taking it but they never follow through. The worst is when they say for sure they buying and when you meet up they change their mind or they do not meet at all and don't have the decency to even call you and say they not coming.
That's not unique to Trinis for that site at all, this happens all the time in general. To my experience, one thing I realized is that so many people just simply cannot make up their minds, it's always one thing after the next without a genuine reason.