West Ham's initial enquiry about a loan deal for the suspended Manchester City player who saved them from relegation in 2007 was given short shrift this week.
"If he would like to join us and the chairman would like to pay for him then yes, why wouldn't you want a top-class player like that?" said the Hammers chief.
"I've worked with some world-class players in my time, they win you games when you least expect it.
"With a goal record like his why wouldn't you want him?
"I've had worse than him. I've had some bad ones in my time. Just keep playing him, that's the answer."
Of the game itself. "It was shocking defending," added Allardyce. "We gifted the opposition two goals and that made life very difficult, in what was otherwise a very good performance.
"But we had to make a lot of changes due to injuries and to produce a performance like that is encouraging.
"We've got 18 points from our first 10 games, which is two behind what I wanted but I expect we will make that up if we continue to play like that.
"It was disappointing to take only four points from three games this week but we are sitting quite comfortably."
"I thought it was a fair result," said Palace boss Dougie Freedman.
"It was two teams playing very different styles.
"One or two of my players went into the game as young boys and came out as men. They are a powerful, experienced side who knock the ball long and you have to stand up against them, and we did."