The X-Men, who have done some impressive things as one of the most famous teams in comics, just added an incredible sale to their list of accomplishments. A copy of X-Men #90 CBCS 3.5 published in October 1974 sold for $5,500 on eBay.

This book reprints X-Men #42 and Amazing Adult Fantasy #7, featuring Cyclops, Marvel Girl, Angel, Beast, Iceman, and Professor X. What truly sets this copy apart is that it was signed by four Marvel luminaries – Stan Lee, Steve Ditko, Herb Trimpe, and Roy Thomas.

“I knew that the CBCS Verified Signature Program (VSP) has been taking off like crazy, but I never expected the price this piece went for,” CBCS President and Primary Grader Steve Borock said.

The Overstreet Comic Book Price Guide #49 values a copy in this condition at just $16, making this an exceptional sale.