This particular case may be driven totally by economics, but it is really weird no matter whether it is logical. People are loath to give up items of value, and would consider leaving anything of value with somebody else as something to be avoided. Even if the item is not working, it could still be scrapped. And then you read this article where planes have been left at an airport with nobody willing to claim them. The concept being that the pending charges for these planes (including airport charges and others) would be so bad that the owners are not showing up to claim these planes. However, it is weird that the airport has no paperwork or documentation to track who actually owns these planes, and these are massive planes (link to article):
The operators of Kuala Lumpur International Airport (KLIA) have placed a bizarre advertisement in a Malaysian newspaper seeking the owners of three 747-200F aircraft apparently abandoned there. "If you fail to collect the aircraft within 14 days of the date of this notice, we reserve the right to sell or otherwise dispose of the aircraft" under Malaysian regulations, said the ad which ran in Monday's edition of The Star. The notice was addressed to the "untraceable owner" of the planes.