I do not often browse the ebay listings anymore. While you can find genuine material, it takes browsing through an overwhelming amount of forgeries and uninteresting stuff.
Here some highlights of the bad kind.
All cancels fake. Most of the base stamps forgeries.
I can see one genuine overprint.
Quite high price tag.
I think there is not a single stamp with a genuine overprint.
And you can spend a lot of money on worthless forgeries.