Yuuki Aoi has already told us about the dress she (or her agency?) has contributed to a charity action for the earthquake and tsunami. Now the dress has finally made it to the auction itself, and bids have quickly passed $4000 (actually ¥349,000), with six days of bidding yet to go.
She has worn the dress for a couple of Gosick TV events:
She says it has been cleaned, but she has added a couple of her bunny signatures, one on the hat and one on the dress:
By the way, I guess these pictures show us Ao-chan's as she looks after going back from the perm to straight hair.