The problem sounds like bevel/pinion, based on how the motor spins when the trigger is pulled. I haven't had the time to open it up and diagnose what's specifically wrong with it. That being said, I feel I justified the price in the post, the fact the gun is £380 new and has a new £50 motor in there means that there's a solid £230 (Not counting the mags) of leeway before the repair costs more than the gun and motor new.
If you think it's a bad deal, just message me and chat prices!
And in response to it looking wonky, best answer I can give there is camera distortion. It's as straight as it was from the factory.