What are three examples of irony in "The Gift of the Magi"?

The most significant and main use of irony which is
focused on in this story is the situational irony that occurs at the end of the tale.
Situational irony is when we expect a certain thing to happen only to be surprised when
something entirely different takes place. We can see the situational irony in operation
therefore when we realise that both Jim and Della have sold what was most precious to
them--their hair and watch--to buy a present for the other to use with what was most
precious to them.

However, a deeper irony exists in the
story. Although we are tempted to dismiss Jim and Della and their actions as "foolish,"
yet the narrator insists that they were in fact actually "wise" because through their
self-sacrifice and love they represent the original spirit of the
Magi:

But in
a last word to the wise of these days, let it be said that of all who give gifts, these
two were the wisest. Of all who give and receive gifts, such as they are the wisest.
Everywhere they are wisest. They are the
Magi.

Thus Jim and Della,
although apparently "foolish" in the eyes of the world, ironically come closest to the
original spirit of present giving.