If I show ladies my HHKB and my fountain pen, what percentage will totally lust after me? 80%?
I flip my spacebar, so that easily ups that percentage to 90%, right?
In terms of a man's possessions that impresses most women, a HHKB and a fountain pen are far, very far down the list. I would say about .002% of women will lust after those items. Now if you have some items that display your thick wallet, adventurousness, or ability to be a provider, perhaps they will be more impressed.
With those points in mind, I recommend purchasing a Swiss mechanical watch, a grappling hook, and tractor to impress the ladies.