if you are the only owner (not bought the computer second hand), you will get $650-700. Can go up based in comestic state, remaining warranties and conditions of use.
If you sell it through a online site, also factor in shipping costs/fees
Oh wow that's higher than I thought!
eBay averages 600 and I got a buyer that'll buy it for 500. Don't know if I should go through with it. I'm in no rush.