I just noticed that Amazon.com has a bunch of coupons for several different fountain pens right now. It's another one of their limited time coupon offers. The coupons are in addition to any normal discount they have on their pens.
A few of the pens they have on coupon right now are the Pilot Stargazer, Monteverde Invincia Color Fusion, Monteverde Artista Crystal, Monteverde Onetouch Stylus Tool, and others. Like last time, move quick because these sales usually only last a few days.