The recently-retired Brook expressed his interest in facing Chris Eubank Jr having smashed bitter rival Khan to bits in February.
Despite a public back-and-forth over the past few months, a fight between the pair never came to fruition – although Eubank Jr claimed that such a clash would no doubt have to take place at a catchweight.
And according to Ingle, the reason for that was because Brook was asking for £10 million before his retirement from boxing last weekend.
Ingle told Boxing King Media: “That’s the kind of money Kell would probably want just to consider it.
“Because he was kind of pricing himself out of the job, really.
“‘Well, so if you really want me to do it, give me that kind of money.’
“I’m not particularly bothered.
“It’s kind of throwing out there just to put people off, well, that’s a ridiculous amount we’re not going to bother with that fight.
“I think that’s why Kell did it, really.”
Ingle also insisted that Brook can walk away from the sport with his head held high following his win over Khan.
He continued: “I think when he got back to normal life, spent time around his kids, looked at his family, his house, and everything and thought, ‘What do I need this for? I enjoy myself now. I’m 36.’
“Like I said, he’s going out on a high. Enjoy your life. It is a bit of an adjustment.
“Of course it is. It’s an adjustment for everybody. It’s an adjustment for him, for the team around him, his nutritionist, me, the kids in the gym.
“But we look back on that night with great fondness because it was a tremendous night.
“It was even a tremendous night for Khan really even though he got beat.
“He made plenty of money, he got a good response, and he played the part. He turned up. He gave the fight fans the fight that they wanted.
“It wasn’t the right decision for him – he didn’t win – but he still got credibility, I don’t care what people think. He had a great career himself.
“The main thing is it’s no good looking at the shiny belts on the mantelpiece. Boxing is about putting money in the bank and finishing with all your faculties. I think Khan has just about managed to do that.”