Elliot Richards: But it's my soul! I can't give you my soul.
The Devil: What are you, James Brown?
Elliot Richards: You can't give sick people 'tic tacs!'.
The Devil: Sick people have notoriously bad breath, I'm performing a public service here.
The Devil: How would you like to make one simple decision that'll change your life forever?
Elliot Richards: Ok, I'm glad scientology works for you but.
Elliot Richards: Maybe I should call you a cab... Although it's gonna be hard to find one that'll go to Hell this time of night.
The Devil: OOOOOOh. What a delightfully piquant wit.
Dr. Ngegitigegitibaba: It's already won the Poo-litzer Prize and it hasn't even been poo-blished, yet.
Elliot Richards: Well, like they say, Dr. Oingegedaydegegdeaybaba, a Pulitzer Prize and a$3.50 will get you a café latte.
The Devil: I am the Devil! Satan, Lucifer, Beelzebub, the Prince of Darkness! Well, the Princ-ess of Darkness, anyway.
Elliot Richards: I'm starting to think that women don't really know what they want.
The Devil: Amen.
Elliot Richards: Oh, yeah. You've been a really big help so far.
The Devil: I know. I've been really naughty, haven't I? Maybe a good spanking's in order?
Elliot Richards: Is that all you ever think about? Do you think everything is about sex?
The Devil: No, of course not! I mean, there's greed, gluttony, sloth, anger, vanity, envy.
Elliot Richards: This is breaking and entering.
The Devil: I know! It's fun, isn't it?
Elliot Richards: Damn the Devil! Damn the Devil to Hell.
The Devil: Do you think your mommy and daddy just made me up so you'd be a good boy?
Alison Gardner: Don't you think that secular humanism is yummy?
Answer: It definitely is a Montegrappa Oriental Zodiac pen, this brand has been making pens in Italy since 1912. I am not sure which of the three red pens in that collection (Oriental Zodiac) is the one seen in the movie, but given its association with the devil, my guess will be it is the Ox fountain pen.