Valhalla non factory termination- lower value?

Here is what a british audio dealer says about Valhalla value:

"the resale values of
Valhalla have dropped significantly lately, especially as yours have non original terminations - even though we know the Bullets are very good, they do devalue the cable."

The market seems to devalue non factory termination in spite that almost everyone says that the bullet plugs are equel or even better sounding than the original factory termination. So i I just wonder how much the market devaluating is.