Numismatutes beware:

coindeuce

Stacks advanced search function on their website is rather useless. I tried numerous key words and phrases in an effort to locate auction history on an item that I was certain which had crossed their "block" in recent times. Plodding through their entire online archive of auction catalogs to find one item was not an option. It was not until I sorted through my collection of hard copies and narrowed the possibilities down to a few, that I was able to accomplish my mission. Stacks could take a lesson from HA in making their auction archives more user friendly.

Barndog

agreed. Stack's has a terrible archives search function.