Scientist Mark Showalter SETI signed autograph signed business card.

Please check out my eBay feedback and buy with confidenc

All Autographs Featured are Guaranteed Authentic and will pass all  3rd party inspection services.

I invite you to visit my other Authentic Autographs listed here on ebay--all at great prices!

Please follow my store to be notified when I list

new items weekly. Thank you for your purchase.