If you like adventure and high-stress work, then this could be the high-paying job for you. Aircraft repossessors can get a 6% to10% commission of the resale price of a plane they get back for a bank. For planes costing millions of dollars, that could add up to £600,000 per plane. You need to be prepared for tough work, though, as some repo men get shot at or even thrown into foreign prisons.
Maybe a safer way to get closer to planes, might either be to work as a pilot or get a job in the cabin crew.