I've owned a large scale internet retail website, so maybe I've just seen more of the scams that people are trying to pull.
God help you if you ship anything and accept PayPal!
Photo ID's are too easily doctored, and meaningless in every legal sense of the word. They simply do not hold up in court.
In recent months, I've talked to too many breeders who have had customers claim they received dead animals, or animals that died shortly after receipt.
The other big scam is when people try to say they were shipped males instead of females.
As for expensive?
Chips retail for $7 and any breeder can pick them up in bulk for $3-$4 apiece.
What does it cost to have you're photo IDs notarized?