During the 1975-1976 syndicated season, a new "Super Deal" was offered for Big Deal winners. At this point, Big Deals were limited to a range of $8,000 to $10,000. The contestant could risk their Big Deal winnings on a 1-in-3 shot at adding a $20,000 cash prize. The other two doors caused the player to lose the "Big Deal", but he/she took home a $1,000 or $2,000 consolation prize. Given this scenario, a Super Deal winner could win as much as $30,000 in cash and prizes (in fact, the first-ever Super Deal won the $30,000 maximum). Later, the consolation prize was changed to $2,000 and a mystery amount (between $1,000 and $9,000).
The Super Deal was discontinued when the show permanently moved to Las Vegas for the final season (1976-1977), and Big Deal values returned to their previous range of $10,000 to $15,000.
https://en.wikipedia.org/wiki/Let%27s_Make_a_Deal
