It's a Beckett Promo. One card from the first 150 cards of the base set were randomly inserted into the May and July, 2002 issues of Beckett Baseball. Each card has the word "SAMPLE" foil-stamped in silver on the back and ten percent of all cards were stamped in gold foil.
They're not listed in the database. It'll require two checklists which are a duplicate of cards #1-150 from the base set. One for the regular version and one for the gold foil version.
Someday my cards may double in value and then be worth half of what I paid for them.