You are looking at a Mint Condition The X-Files Series One Promo Card #P3 by Topps from 1995.
It will ship in a soft sleeve, top loader, sandwiched between 2 pieces of cardboard in an envelope via First Class Mail.
Combine shipping on up to 3 cards at no extra shipping and .50 for each additional card afterwards.
For more cool stuff, please see my eBay Store.
Cheers.