Sir Alex Ferguson insists Manchester United will not accept anything less than the top price for Ruud van Nistelrooy.
The Holland striker is looking to leave Old Trafford after handing in a written transfer request with both Bayern Munich and Real Madrid keen.
However, with United holding out for a fee of £15million, Van Nistelrooy has been forced to return for pre-season training although he played no part in the Red Devils' 3-0 win over Celtic at Parkhead.
Real Madrid are believed to have tested United's resolve with a second bid for the 30-year-old, which is thought to be a straight cash deal of around £10million.
Ferguson told MUTV: 'I read it on teletext and I spoke to (chief executive) David Gill and nothing has really materially changed.
'They've slightly increased it but nothing really you would say - for goodness sake, an increase of about two bob or something.
'We know our value. If we are going to sell Ruud van Nistelrooy we should get the proper value. He is one of the best strikers in the country, one of the best strikers in Europe so when you think about (Andriy) Shevchenko going for £35million - he's a similar age group.
'But we know our value of the player so at the moment he is a Manchester United player.'
Asked if Bayern and Madrid were a long way from that valuation, Ferguson responded: 'Absolutely.'