I heard about that I havent actually used them but I have been up there to see what they have got oh I did get some gravel for the yard once from someone ..yes one should be careful..
Just be wary of where you meet the people selling stuff and when. People have been hurt by dishonest people through craigslist. I don't mean just financially hurt by scammers. I mean by people who have been harmed and even killed. It is wiser to meet the seller in a public place where there will be a lot of other people around. I'm sure that not everyone is like this, but this is something to be aware of.
E Bay is still a good thing to do, my DD has got many new pieces of furniture from Ebay at ridiculous prices..craigslist has the same .
I do a lot of Christmas shopping at Overstock.com. Flat rate shipping and I can find some pretty unique things for a good price. Actually I bought my kitchen table from there and not only paid less than even Walmart.com, had it delivered for a whole $3.