The Villa boss says he could be tempted back into the market before the window closes, with the Scot always on the lookout for quality additions.
He has also conceded that players could be moved on, but insists there is nothing to report on either front at the moment.
When asked if he is still looking for fresh faces, Lambert told the Birmingham Mail: "We try. I don't ever stop looking at people. Whether we've got the money or not, I think it's important to always keep looking to see.
"You probably can't do what a lot of people think you can do.
"We try, but there wouldn't be any major movement. If something came up I thought was right and financially it was right, we'd look at it."
Villa have already allowed Darren Bent and Nathan Delfouneso to leave on loan this summer, to Fulham and Blackpool respectively, and reports suggest that Stephen Ireland, Shay Given, Alan Hutton and Barry Bannan are also surplus to requirements.
On what the future holds for that quartet, Lambert added: "It's up to other teams to make the move.
"I really don't know. Until somebody picks up the phone and actually asks. I can't speak for anybody else, it's up to them whether they're interested. They know the phone number."