Good news! Thanks guys
The kit will be brand new, unassebled MBX8. The engine combo will be brand new as well.
As for the liquids - the only ones will be a 50ml bottle of shock oil + 3 microscopic (~10ml each I guess) diff oil bottles so I suppose there will not be a problem.

He can always throw away the oils - no big deal. I was more concerned about the buggy and engine as this would be a BIG loss if they forced him to throw it away...