Any offer would have to be significant and dwarf the £3.5million Newcastle paid FC Twente for the midfielder.
Pardew said: "You never know with the window. It's such a minefield of possibilities.
"We have one or two players here that top clubs, I'm sure, will be interested in, but the one thing I would say on that is that they are going to have to pay a lot of money to take anybody out of here because we are obviously in a good position, not just on the playing side, but financially as well.
"In terms of players coming in, there is certainly one player who will come in and we are hoping maybe two - if we don't lose anybody."