It is wrong to reveal the AP value of an armatar, since it gives away a surprise. However, if you see an armatar being used by a user with less than 10,000 AP, you can rule out that armatar.
@ jjman070 : To be specific... it's the square image next to your username and you can change it with the Control Panel link underneath your username in the far right top corner of the screen!
@ pedroUSER : As for the images of the 10,000 AP armatars... think a little on how to know which ones could be it by using the rankings... that's all I want to hint on that! Good luck! =)