Q. Can you sell chosson Torah or Bereshis to someone visiting from Eretz Yisrael?

A. Poskim disagree; Chaim Shoal (1: 13) rules that one should not honor with chosson Torah or Bereishis one who is not keeping that day as Yom Tov, since it may appear to be a prank or a trivial act.
However, Chelkas Yaakov (3: 134), Sridei Eish (end) relating that Horav Yechezkel Sarna zt’l accepted the honor of being named chosson Torah when visiting Chutz Laaretz, since it was well known that the Rosh Yeshiva always received that honor and not being called would appear similar to mourning in public. Yom Tov Sheni Kechilchoso (11: 4) quotes that Horav S.Z, Auerbach and Horav M. Feinstein zt’l also permitted, arguing that this are extra aliyos, and not an essential part of the five required on Yom Tov.
Horav Shlomo Miller’s Shlit’a opinion is to avoid when not needed.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a