Wilder turned down a deal offered by Eddie Hearn to fight on DAZN later this year.
However, Finkel was impressed by the figure put on the table.
A problem arose because Joshua’s side would not share the amount they would make from the fight.
The pair have been tussling over purse amounts for well over a year but this is one of the first positive admissions.
“The amount of money that was offered by DAZN was a lot of money,” Finkel told Sirius XM At The Fights.
“But it’s not a lot if you find out later that Joshua got double that.
“In any case, the first fight was going to be [Dominic] Breazeale.
“On May 18, the fighter we were always going to fight once we lost [Tyson] Fury.
“And instead of it being on DAZN it’s on Showtime. We believe this is a lot better for the fans.
“Because you’re going to be seen by millions instead of tens or hundreds of thousands of people.”
Joshua takes on Jarrell Miller and Wilder is up against Dominic Breazeale this summer.
But if the two want to go toe-to-toe later this year then it may be the only time they will ever meet.
“(If Joshua got knocked out) I don’t believe there would be a rematch, they (Matchroom and Eddie Hearn) wouldn’t want him to get knocked out twice,” Finkel added.
“I believe there would only be one fight.
“And I asked how much Joshua would be getting. Don King used to say to me, ‘I’ve paid a fighter more than he’s ever gotten before’. But is it the right amount?
“Just because Don gets a huge amount, say from the MGM and gives the other fighter a fraction, doesn’t mean he’s paying him the correct number. And I feel the same way.”