Eddie runs into the housing shortage at the real estate office that was still prevalent in the years after World War 2. And it shows how people would often have to pay a premium (or a bribe in this case for the "janitor") to secure a place to live, especially in urban areas like New York City.
The pinball machine beside the phone booth at Sammy's place - seen behind Eddie as he's playing with a toy car on a counter - is a "Silver Streak" model by Bally from 1947. The company produced a different machine with the same name in 1935.
The car Eddie sells is a 1940 Chevrolet Master 85 Business Coupe. New, its base price was $695 ($14,900 in 2024), so the $800 he got for it in 1948 seems like it would have been a good deal ($10,500 in 2024). However, one has to consider there was still a pent-up demand for cars in the years immediately after World War 2.
All through the movie everyone pronounces the bad guy's name as Kelch or Keltch with an l and not Ketch with a t sound as the character is billed.
First, and penultimate, feature film directed by Felix Jacoves. He had previously been a dialog director at Warner Bros.