In YD Siman 151 it discusses the things that one is allowed and not allowed to sell to a gentile (for reasons that they might be used for Avodah Zara -- idol worship). I didn't see the following ...
For someone sharing an apartment with a non-Jew, do the common doors in the apartment need a mezuzah? Does the Jewish person's bedroom even need one if the apartment is shared with a non-Jew?
Notwithstanding anti discrimination laws which may disallow a seller to only sell to other Jews exclusively. Suppose a Jewish fellow - living outside of Eretz Yisroel - lives on a block which is ...