Yes, quite a few things to watch out for, mostly common sense really though.
Have taken people to collect a few motorbikes over the years, turning up at an address on a dodgy looking estate to meet someone you dont know with a few thousand in your pocket. We always go without money now, check the bike or whatever out, and the person of course and also that they actually live at that address, sometimes they meet you outside, if all ok then go and get money from bank and return.
Also if you list a lot of high value goods, some will buy just to get your address, and never turn up, well that day anyway. Best to put on listing that item is stored elsewhere so will have to fetch if they want to view or collect.