Pretty bad situation all round, hope it can get resolved somehow. What a sh** start to life for this little spider!

Is your friend going to keep it? If the seller takes it back I'm pretty sure he will try to unload on to someone else, making a profit Im sure as well!

If he can't offer a sensible solution i would bring the situation to a relevant authority, whether its being miss-sold on the internet, or to an animal welfare group similar to the RSPCA that we have over here in uk for selling unhealthy livestock.