When asked about the prospect of Rosler making moves for Brentford players, Warburton told Sky Sports News: "If he does, they will go on our terms. If Robin van Persie can go to Manchester United then everyone has their price.
"But the fact is we have looked after the players, there are a lot of boys here on three-year contracts which is unusual in League One but we recognise their talent and want to keep them here.
"So for us it's very important that if they do come in then of course there's a price, but it's our price and not the buying price."
Brentford currently sit fourth in the League One table.