Zaha has remained Gunners boss Unai Emery’s No.1 transfer target since the summer window opened in May.
The winger tortured Arsenal’s defence in both Premier League fixtures last season, helping to earn his side four points.
He won a penalty under Granit Xhaka’s challenge at Selhurst Park and left Shkodran Mustafi baffled to score at the Emirates.
Emery has explored cheaper options in Yannick Carrasco and Ryan Fraser but both deals have stalled.
Zaha recently boosted the Spaniard’s hopes of signing him by telling Palace that he wants to leave and that Arsenal are his preferred destination.
But there are a series of stumbling blocks to overcome if the Ivorian is to be wearing red and white, rather than red and blue next season.
It has been well documented that Arsenal have only around £45m to spend in the current transfer window.
Failure to qualify for the Champions League for three consecutive seasons has cost the north Londoners dearly in financial terms.
And despite Zaha telling them he wants a new challenge, Palace are prepared to protect their Premier League status at all costs, and see keeping their talisman as imperative to doing so.
But they are aware that every player has their price and the former Manchester United winger is no different.
Zaha scored a combined 19 goals and eight assists in the Premier League in the past two seasons, underlying his importance to the Eagles.
According to The Times, they want to earn £70m from any deal which would see the 26-year-old leave the club.
But it is claimed they would have to sell him for about £93m as they must pay the Red Devils 25 per cent of the profit because of a sell-on clause.
That would represent an enormous mark-up for Palace considering they paid United about £3m for the player in 2015.
Zaha earns £130,000 a week and last summer he extended his contract at Palace until 2023 with no release clause.
Arsenal, meanwhile, hope to raise funds by offloading senior players and free up space in a wage bill that has spiralled to about £220m.