I believe the subject of pedigree should be avoided at the cost of spooking the scammer. If the subject is pushed too hard, the "seller" may think the dam and sire will be run through a database. They are not dummies. If they are scamming, they are looking for people without experience in breeding and showing. Ms. Pat, I understand your interest in the pedigree…you ask this of everybody and it is a first question for you. However, you are a breeder and have a reputable kennel. Your insistent question of pedigree is a giveaway on this and will spook a criminal.
Scams like this can be "busted" by Interstate Commerce Commission, US Postmaster, FBI and, if taken across our northern border, Interpol and RCMP.