I noticed a mark on the case of #1 (see photo). Huge Key issues from the Early days of Marvel. These will only go up in price. Please see photos for further reference.The item "X-Men #1 #2 #3 All 3 Graded CGC Marvel Silver Age Stan Lee Jack Kirby KEY" is in sale since Tuesday, August 31, 2021. This item is in the category "Collectibles\Comic Books & Memorabilia\Comics\Comics & Graphic Novels". The seller is "barternet" and is located in Greenfield Center, New York. This item can be shipped worldwide.