It's as rare and as valuable as a card with ink bubble spot, missing foil on the front, miscut, etc. There might be a collector out there who will pay a small premium for something like that (if it's a $2-3 card normally, you might get $4-5), but it's not going to fund your retirement or a college education.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).