Local area Craig's List is the ONLY place I buy/sell. Touch, see, smell the item and hand to hand cash and carry. Always some type of Ham gear listed in my area.
While you can find some good buys on it at times you also have to be very careful because some dump junk there.
CL also has people selling stolen electronics on it. I bought a iPhone 3 on Ebay from a guy who said he bought it on CL. It was advertised "not working". I decided that I didn't want it and sold it to somebody else. She got it to boot up...and it turned out to be stolen. If a seller doesn't know anything about the item, it may be stolen. I see ads that have only a photo and a few words in the ad saying "Icom IC-756" or something like that. Such ads are probably stolen stuff. Caveat emptor, always.