Parlour insists the Gunners must flog their skipper and reinvest the cash on new recruits.
He said: "Arsenal need to sell Robin to the highest bidder and if they can get £15million for him, give it to Arsene who can buy someone else.
"The fans need a lift. Get the money and make a big signing such as Papiss Cisse at Newcastle. Once he starts scoring for fun, the supporters will soon forget about Robin