The car valuation (based on Red Book) tool at drive.com.au lists a 2004 Euro luxury as:

4D SEDAN , 2004 , 2.4 lt, 5 SP SEQUENTIAL AUTO
Average km's travelled 23,000
Price when new $42800
Estimated Valuations:
$28620-34980 private sale
$27200-31800 trade in value
$37800-45360 dealer price

HONDA ACCORD EURO LUXURY
4D SEDAN , 2004 , 2.4 lt, 6 SP MANUAL
Average km's travelled 23,000
Price when new $40800
Estimated Valuations:
$27180-33220 private sale
$25800-30200 trade in value
$36000-43200 dealer price