Do you keep the original box and packaging of your pens?

[Pterodactylus]

It was my understanding that the OP is not asking whether he should pay extra to buy a pen's box and papers, but rather, whether there is good reason to keep them in the realm of the fountain pen hobby.

True, but as the discussion evolves it might be a valid additional question if some would pay more to have it or not.

Old vintage ones I would not toss away but would not pay extra.

And a monetary bonus is imho the only really reason to keep such things.

I remember my grandparents seem to have kept many original packages independent of the goods they bought.
The basement of their house was full of packages of all kind.
Some answers I got when I asked for the reasons were: what if I have to bring it back for repair, warranty,... might be needed for transportation later,..... I can put it back when I do not use it for a while,......, the packaging belongs to the product,.....
Maybe the times were different in the past and people valued things (including the packaging) more, for me it looked always a bit like a hoarder mentality.