Saha is Everton's third signing of the summer after Lars Jacobsen and Segundo Castillo, but Moyes is not satisfied with his summer transfer activity and believes the club still lag way behind the so-called 'Big Four'.
He said: "We have brought in four players but not spent any money - let's put that in perspective.
"Some people pay £20m for one player, we have not paid that for four or for any."
Everton recently failed in a bid to sign former Chelsea playmaker Tiago from Juventus and a move for Inter Milan's Nigerian striker Victor Obinna has fallen through because of work permit problems.
The Scot is also disappointed that all his side's transfer activity has come as the end of the window approaches.
"I don't think that's good - I don't think it's good planning when you get it right at the end," he added.
"I think it's better to have your business done early and have a pre season."
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