Mirallas and Jelavic cost less than £11m, a further example of Moyes's creative transfer policy while working within tight financial restraints.
And the Goodison manager is convinced the duo are already showing they represent an excellent long-term investment.
"They are good value," said Moyes. "They are both international players, both young enough to stay with us for a period of time."
"They have made a great contribution. We just need to make sure we keep on top of Jelavic with his fitness. We knew he would be a bit short last Saturday."