I bought two things on e-bay. The first was a copy of an old TV program. Turned out that it was a bootlegged copy, and not a very good copy at that. It gave my DVD player fits.
The other thing was a bayonet for my M1 Garand. This was the genuine article and looks good on the M1.
Yes, you can find the good people, but there are sharks in that thar ocean.