Not necessarily true. I've seen fakes on the bay as well as fakes from reputable auction houses. The bay has more than it's share, however. Besides, many of the sellers on the bay are Vcoin dealers. There are others that are reputable as well. FAC for one.
Nathan at HHC. I've actually gotten quite a few coins from him, mostly U.S & world coins but a few ancients.
Yup, there are some good sellers on eBay. I have a few sellers that has me as a repeat customer. Never had a problem with authenticity.