Chris Wilder remains optimisitc about strengthing his squad in the coming weeks.
Having spoken for much of the summer about 'adding quality' to his squad, the Blades boss is now keen to build on the season-long loan additional of goalkeeper Dean Henderson from Manchester United.
But Wilder admits he may have to be patient, he remarked: "We've got a couple of bids in for players and there is a lot of work going in behind the scenes, there has been for three or four months now.
"We talked about adding quality and in Dean Henderson, we feel we've signed the best goalkeeper in the EFL from last season and we've been successful in the majority of transfer windows to date, in terms of additions we've brought in and decisions we've made."
The manager added: "But we're in a different scenario compared to the likes of Nottingham Forest, although we remain in a stronger position than a lot of others clubs.
"We have to do our work our way, I wouldn't want to build a house and nearly finish it, for someone to come and smash it up, but we've got a great structure and a solid base to work from.
"We can't go toe-to-toe with a lot of our rivals so we have to find different ways and different players to those being touted round the division."