* Silver Surfer #1 (1968): The first appearance of the Silver Surfer, this comic is one of the most iconic and sought-after Marvel comics of all time. In high-grade condition, it can sell for tens of thousands of dollars.
* Silver Surfer #2 (1968): The second issue in the Silver Surfer series, this comic features the first appearance of the villain Thanos. In high-grade condition, it can sell for several thousand dollars.
* Silver Surfer #3 (1968): The third issue in the Silver Surfer series, this comic features the first appearance of the villain Mephisto. In high-grade condition, it can sell for several thousand dollars.
* Silver Surfer #13 (1969): This issue features the first appearance of the character Nova. In high-grade condition, it can sell for several hundred dollars.
* Silver Surfer #14 (1969): This issue features the first appearance of the character Adam Warlock. In high-grade condition, it can sell for several hundred dollars.
In addition to these key issues, other factors that can affect the value of Silver Surfer comics include the presence of variants, reprints, or autographs. For example, a Silver Surfer #1 with a Stan Lee signature can sell for significantly more than a regular copy of the comic.
If you are interested in collecting Silver Surfer comics, it is important to do your research and carefully consider the condition of the comics you are considering purchasing. You can also consult with a reputable comic book dealer for expert advice.