It actually seems to be more common than you'd think. I recall a 747SP (P4-AFE) being scrapped at ELLX in 2002 after being parked for 3 years with the owner allegedly unable to pay a large repair bill, and another 747 (VP-BXC) scrapped after being parked for nearly 6 at the same airport, with the owner being bankrupt and the plane deemed not airworthy after landing.
Luxemburger Wort - Stranded Boeing 747 to be scrapped