The only way you can be sure the sets were never searched is to purchase them in the ORIGINAL UNOPENED package delivered from the mint... The package will have all the necessary information, such as the Order Number, Name & Address the package was sent to, the date and quanity of sets in the package, etc... If the packaging (paper tape) doesn't look right, chances are the package was open...
I was also thinking that a dealer could purchase a large lot of Mint & Proof Sets on the secondary market and may be telling the truth that he didn't inspect them and are unsearched by him, but without the original shipment boxes I would assume that whoever the dealer purchased them from did search them...
I was also thinking that a dealer could purchase a large lot of Mint & Proof Sets on the secondary market and may be telling the truth that he didn't inspect them and are unsearched by him, but without the original shipment boxes I would assume that whoever the dealer purchased them from did search them...


















