I got my 2003 in December for 16,400+ttl. It's hard to say what you should get now since most sites don't have incentives and Invoice prices posted anymore. Here is what I remember. 2003.5 sticker is 21,000, invoice is about 19,500 (includes destination charge, 2003 is 500 less). 2500 rebate, unpublished 500 cash to dealer (came out in January I think), 3% of invoice dealer holdback.
19,500
-2500 rebate
-500 dealer cash
-600 holdback
$15,900
If what I remember is correct, you should be able to do around $16,000. Maybe better since it is out of the 2003 model year.