Value of Montblanc Pen

[kcmo]

Guys/Gals,

Neither my hubby nor I are really 'pen people', per say. My husband received the following Montblanc pen as a gift about 2 years ago and it has never been used. As its been in its box in a drawer, we're wondering if we should just sell it or if there's any chance it might actually increase in value over the years.

Montblank Starwalker 100 Years Soulmaker Ballpoint Pen
-features a crystal top with floating diamond
-clip with 100 years engraved on it
-three platinum-plated rings
-6 ink refills

I did some preliminary research and it looks like the going rate for this watch is $400-$500.

Any info would be appreciated.

Thanks!