Johannes,
Interesting work on the unsold bottles. Do you have a split between unsold at any price and unsold at reserve price. I assume 95% of them will be unsold at reserve price.
Your plan to look at unsold bottles on a per bottles basis looks interesting.
I think you’d need to compare the reserve price to a fair value price to decide if the reserve was too high or the bottle was falling out of fashion.
Keep up the good work.
Alan