Well Moyes found Arteta for 2.5 million so he could find another bargain who has potential to take over his role in the future. We will have some money to spend but not that much. However, selling Arteta would be a backward step and would lower team morale.
Moyes is building a squad here to break into the top 4 so why would he sell his best players? We need to keep our best players and add to them. You can't just have a best 11. You have to have competition to get a place in the first 11.
Found this Leighton Baines
His 4 assists are against Newcastle(2), Hull and Arsenal.
It quotes on that page ''Baines's three assists put him joint top among left backs after his cross was headed in by Marouane Fellaini in Everton's 2-0 win at home to Hull.''
Well he has defended very well, provided some great crosses and has 4 assists or so which is great for a left back and recently has been one of the best left backs in the country.