I don't know if I would call it ****ing bullshit.
ebay charges the seller a percentage of the final bid price.
So, if you were an ebay seller, you'd want to sell something for $1 and charge $99 for shipping & handling. Then you'd pay ebay a percentage of $1.
As long as sellers list the S&H, I'm OK with it. Just add it to your bid amount to know how much you will pay.
Sorry, nothing to say about the camber kit....