According to a Summer 2009 Football Beckett's Plus the Marino Gold books at $24.00. THe base lists at $8.00 and the Gold multiplier is 3X.
In a 2013 Football Beckett's Plus the 1995 SP All Pro inserts are no longer listed. That set is one of the many sets/inserts that Beckett's Plus deleted from it's price guide which is why I have to keep the 2009 issue handy!!! As it is I still use the 2009 issue for pricing more often than the 2013 because it has so many more price listings.
Anyways, I'd safely assume that the Marino gold is still a $20-$24 card.