Manchester United boss Louis van Gaal says he won't buy for the sake of it.

Van Gaal recognises there is not a long list of world-class talents currently available in the market.

"When I cannot improve my selection, then I wait," he explained to reporters. "And then I maybe have to wait a year more. Maybe you think that there are so many fantastic players, but it is not like that.

"[However,] I don't [necessarily] prefer to wait until the summer when I can improve my selections. That I have showed with Valdes.

"When we can buy a player who can improve my selection, the club shall buy. Money is not interesting. It is always quality of the players in comparison with the other players that I have. I have to compare. I have to decide. Money doesn't play any role."

The boss has a vision of enhancing his squad and challenging for the top honours and is confident he will achieve this goal.

"Now that I coach Manchester United, I expect more attacking quality," he added. "If it is not this year, then next season or the season after that. We shall improve and you shall see it."