Mr. Burns tells a hippie to "shine on you crazy diamond", referring to the song by Pink Floyd of the same name.
One of the books Homer tries to throw out is titled 'Dickens'.
The montage in the middle with Burns begging Lisa to help him is a reference to the opening sequence of the TV show, "That Girl".
The wrestler who buys Mr. Burns’ house is Bret "Hit Man" Hart.
Lisa, Homer, and the rest of the family could clearly see Mr. Burns's check has “TWELVE MILLION” written on the bank order, as well as $12,000,000.00 written in the box. Homer obviously knew the check was worth twelve million dollars instead of twelve thousand.
In episodes taking place earlier than this episode, it is stated that Burns is a billionaire. However, he is worth approximately $100 million at the beginning of the episode. If he had lost at least nine hundred million by the time this episode takes place, he must have known he was losing money. Burns may have been senile, and thus ignorant of the amount of money he was losing.