The Gunners see the Ivorian as their top target this summer.
United have a 20% sell-on fee, causing Palace to overvalue the winger.
Their current asking price is £80 million.
According to the Evening Standard, Manchester United are behind the sky-high price of Wilfried Zaha.
When the Red Devils sold the winger back to Crystal Palace in 2015, they inserted a 20% sell-on fee as Palace had little cash at the time.
Now, the club wants to raise in excess of £60 million for the 26-year-old but is forced to increase it's evaluation to £80 million due to the clause.
If Palace's asking price is met, United would get a hefty £16 million paycheck.
Previously, reports claimed that Arsenal were ready to offer around £55 million plus a player on loan, which is just short of the £60 million Palace want to receive.
Do you think Zaha is worth £80 million?