Grealish, on-loan from Manchester City, and summer arrival Dewsbury-Hall - from Chelsea - have been outstanding for Everton this season.
Moyes said, "I tried (selling the club to targets) in the summer but I didn't get much joy.
"If you had been looking at Everton over the last few years – and I am not being critical of anyone – you may have had question marks.
"The people who come now see the stadium, the team building, us trying to be out there in the market to be competitive. If we do that, we may be able to attract players who we couldn’t maybe last summer.
"I would expect anyone to (want to) come to Everton. I was shocked when people were saying they didn’t want to come.
"The ones we could sign in the early days (Moyes’s first reign), most were saying they would love to.
"I get so much pride in getting players in the England team. Ozzie (Leon Osman), I got more pleasure in getting him in the squad than anything, it was 10 years of him playing well and sticking at it. If I could get Kiernan, Jimmy (Garner) into the team, that would give me pleasure."