From diversions.dudecheckthisout.com (with a nice card shot):
“From Saturday flea market sellers to baseball card dealers, it seems everyone knows that Mars Attacks is one hot set. There’s something about the phrase “Mars Attacks” that instantly puts dollar signs in seller’s eyes and you may never again experience such “creative pricing” when buying any other cards. Thus the wide set and card price range listed above.
In 1986, a similar set was produced by Bob Ting entitled “Uranus Strikes” which has been embraced by Mars Attacks collectors.”