Value question on Monte Blanc Pen w/floating diamond

[mickfluff]

Was given a pen long time ago and never used it, still in original box etc...its a Meiststuck Montblanc, Diamond Classique Ballpoint Pen. Box states made in germany and has some numbers etc 105980. Got a neat floating diamond at top.

I have everything, the outer box, the main box, inside padding, certificate and writing instruction manual.

Not a pen guy here so trying to gauge value. I see them on certain websites for 2k? and the seem some on ebay with no boxes and heavily used time to time for less then a grand.

This has no scratches or other. Any advise would be great. Also, if I sell do I list it here in pen forum or other?

Strange question, could the pen raise in value? Should I just stick it in safety security box and forget about it and leave to my son? Not thinking it will every be a holy grail here, just curious if in 10-20 years could be something neat to pass along.

Thanks for your wisdom and input...

Steve