I'm happy to provide any additional info or pics if needed, just message me. I know there is nothing more frustrating than receiving a poorly packaged book that arrives damaged. I make every effort to note noticeable damage to the slabs, but minor imperfections like small scuffs are extremely common straight from CGC/CBCS/PGX.
Newton Rings are also extremely common in newly slabbed CGC books (CGC tried to fix their past problem of movement within the case by sandwiching the books tighter in the cases, but as a result, the majority of newly slabbed books have some degree of rings). If these are important to you, please reach out to me and I'll be happy to provide more detail on the case. For those unfamiliar with Newton Rings: This is an occasional effect produced by the inner and outer cases being in direct contact with one another. The visual effect is similar to oil on a water puddle because of the two plastics.
Ultimately it is not anything that is in direct contact with your comic, nor will it affect the comic's condition over time. The item "AMAZING SPIDER-MAN #53 9.2 CBCS Dr. Marvel (1967)" is in sale since Thursday, June 6, 2019. This item is in the category "Collectibles\Comics\Silver Age (1956-69)\Superhero\Spider-Man".
The seller is "top-drawer-collectibles" and is located in Los Angeles, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Egypt, Jordan, Sri lanka, Luxembourg, Nicaragua, Peru, Paraguay, Viet nam, Uruguay, Russian federation.