I rented a townhouse to the son of a well known Japanese electronics company back in the late 90's. The son was getting a degree from Cornell University while here in the US. When he finished his degree he left. Just walked out the door and left everything. His rent was paid 6 months into the future so I thought he was coming back. After the rent went unpaid for one month I sent out certified mail to find out what was going on. After the legal amount of time had passed without an answer, I entered the apartment to clean it out. This guy left everything, top of the line computer, designer clothes thousands of dollars in Armani, Gucci, Prada, all the furniture, electronics equipment galore, most of the clothes were worn and not clean. I reached into the pocket of a Prada ski coat and there was 500 dollars in cash! By the time I had checked the rest of the pants and coat pockets I had near 4k in cash.
What totally blew my mind was he also left his two cars a Audi A6 and a Prelude, both less than a year old and completely paid for. It took many months of paperwork but we did end up with the cars in the end too.
I still have not heard from him or his family.