Kerry hit the nail on the head.
When an object of beauty is proffered for consideration everybody to one extent or another is blinded by the outward physical appearance and fails to perform the required due diligence. Wife's husbands homes boats cars and future step children are included in this category.
If a high level of due diligence is done by a person desiring to own a Cobra Jet Mustang, he or she would be flying around the country inspecting cars and would likely never buy one and at some point would simply give up the chase.
In my opinion, honest muscle cars are rarely for sale on the open market. Honest muscle cars have a private following and are sold or traded away on the cuff to a friend or acquaintance.
Car dealers have existing well heeled customers that would trade up or purchase outright a gem on a phone call, the terms of the sale hidden from view with the exception of cars from a known collection sold at an estate auction.