I have a 2006 Mac OS X 10.3.9 Resale Value??

Knowing that it's about 2 years old, I'd have to guess an estimate about $250-$500, not quite sure. Your going have to take it to a local computer store or ebay to find out the Retail Value on it. Since its in good condition, I'm have to say no more than $600 probably. I hope you get a good deal out of it. Good Luck!