How much is my MacBook worth to sell?

hey. I've got a MacBook 11" late 2014 (nov14) air, with original box charger etc. with all the standard lower price hard ware.

so all your standard stuff. Recently I have accidently dropped my iPad on the apple logo whilst it was shut and it had made a crack in the screen, the screen works but it's unseable. Everything else is in mint condition, the body, hardware due to hardly any use, as if it's brand new with a damaged screen.

it all still works as I have a hdmi for the TV for my macbook.

unfortunetoy, I haven't the funds to even get it fixed or fix it myself. So only use fir it is to sell it.

due to what I've described how much is it worth? I live in the UK. I gave tried looking for price Comparrisons but nothing similar. I'm only guessing around £480? It was brand new £759 so I reckon its a good proving or have I got it wrong?