It depends on a lot of things. How many sticks does it come with? Old style? Is the system US or Japanese? Modded or stock?
For the most part, a boxes AES in nice condition would sell for $200-300 depending on where it was advertised. The condition of the system and sticks itself is the biggest deal. If the logos are faded, and the system and sticks are covered with scratches, expect the value to drop.
EDIT: I just noticed it's a US system.
<small>[ May 09, 2003, 10:42 PM: Message edited by: Ghost-Dog ]</small>