How much can I get out if it?

A while back i dropped it and it has a dent on the top part of the screen. and bottom left hand corner of the keyboard. A few months later the Airport card stopped working. The logic board still works, harddrive is good, battery is good. Screen still works with OG box and charger. I'm trying to sell it because Apple said it's $750 in repairs to get the airport card fixed because they have to replace the whole screen because of the antenna wiring or something. Any suggestions or tips?