I've bought a vintage Chanel and a LV pouchette- but both sellers first sent me extra pictures (which I then had authenticated on here) and we met in person in a neutral place so I could carefully inspect them to make sure they were the same bag that was it the pictures. I got great deals- $350 for an almost perfect Chanel, and $150 for a barely used pouchette.
I also bought a ring once, just because I liked it- and the woman swore up and down that it was worth WAYYYYY more than the $50 she was asking for it. Just for the heck of it, I had it appraised, and it appraised for $600!!! So sometimes, you can get great deals on Craigslist.