Blues boss Roberto Di Matteo wants to add the Nigerian winger to the abundance of attacking talent brought to Stamford Bridge in the close season but have so far failed to see eye-to-eye with the Latics over a fee.
Moses can leave the DW Stadium for around £9 million but Di Matteo is reluctant spend a chunk of his remaining budget on a player that scored just six Premier League goals last season.
Whelan claims the Champions League winner have made an offer made up of appearance based add-ons but inisits the only way they can sign the 21-year-old is by meeting his valuation in full.
He told Sky Sports News: “Chelsea have got to make their mind up – yes or no – and at present they’re messing about a little bit which is unusual for Chelsea because they’re up front if they want someone.
“They would usually go and make a bid and get the player.
“With Victor, Chelsea have come in with offers including payments later, etc.
“It’s unusual for Chelsea because they’re usually a very straightforward club.
“If they come with the fee, we’ll sell him. If they don’t, we’ll keep him.
“I’d like to keep Victor – I think he’ll benefit enormously from spending another season – or two or three seasons – under Roberto Martinez.”
Moses is keen on a move to Stamford Bridge after becoming disillusioned with battling against relegation in the two-years since his move from Crystal Palace and has seen his path to West London cleared by Romelu Lukaku’s loan switch to West Brom.
Manager Roberto Martinez has already brought in a replacement after completing the signing of Ivory Coast attacker Arouna Kone from Levante earlier this week.