In a KYKY promo from October 1983, a contest entrant couldn't believe he'd won $980 in the station's Great Variety Giveaway. He kept repeating, "You're kidding me." The promo used the caller's disbelief as a segue for declaring, "We're not kidding when we say 98, 980, or 10,000 dollars could be yours..."
According to the inflation calculator I consulted...Wow...Forty years ago, $980 was equivalent to more than $3,000 in today's dollars.
If I'd won that kind of money then, I'd have wondered if the DJ was kidding, too.