Asked why the move had collapsed, Keane jokes: "As usual, it comes down to money."
Speaking at The Overlap Live in Manchester, he added: "I've said it before. The deal has to be right for everyone.
"It didn't fall into place last week. It wasn't meant to be.
"Everything has to be right. The right challenge. The right contract. You have to fancy it
"I've not had that opportunity the last few years. There has not been a club where I think, "I'm the right fit for that club".'
He added: "If I don't get another chance, it's no big deal.
"You need a bit of luck. The right club has to give you the call. That hasn't happened. It's no big deal."
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