Regarding the comics industry recent reholder scandal / scam, please note that all books I sell were submitted directly by me to CGC at various comic conventions (as well as the occasional private signing event).  I do not buy already graded books and then resell them.  So every CGC item I have for sale was graded by CGC and then came directly to me and not through another dealer.  Please further note that photos, prints, and original art sketches (that are not on actual comic books but are rather just on sketch paper or the like? i.e. anything certified by CGC that does not have a grade, are not searchable on their site by the serial number.  Only graded comics and magazines - items with grades - are searchable by serial number.  However, for such items not searchable on their site, you can call CGC Customer Service and they can verify the item authentication over the phone.  

Signed by Aaron Lopresti on 11/25/2015 “On 1st Day of Issue Release” and so noted on the CGC label, this VaultCollectibles exclusive variant cover edition of Batman: Dark Knight III The Master Race is the sketch cover version and limited to only 2,000 produced.  Based on our research, our variants are the only versions of DKIII to be signed on the 1st Day of Issue Release and certified by CGC as part of their special Signature Series.  With Signature Series books a certified witness, employed by CGC, actually observes the signing of the comic and then immediately takes possession of the book so there is no possibility of the real autograph being switched out with another. Case is scratch and defect free. It will be shipped with the utmost care.