Bookwyrm - The Thread KillerDon't talk to me! I'm a shrub. - Frozen Man
I like the idea in a roleplay-like context, but I don't see how this would benefit anybody much. Laundering items costs next to nothing, so it doesn't really hurt you to launder it before selling it--and most people only launder things that are worth selling (motifs, recipes, etc.) or for the legerdemaine experience.
Not against the idea, I just don't see the point of it either.