Not to forget amazon.com. I am actually in awe of their boldness in completely ignoring UI design trends.
They are old-school because they are lazy about it, not because something is already optimized.
Whenever I hear about how great a Amazon is as a company, I just do a single search and am dumbfounded.
Example:
If you type the name of a product - even when it is in their catalogue - it may not come up.
Search for 'mousr' on Amazon and you only see PC mouses.
The only way you can get to the mousr product is by typing the company name.
It's ridiculous.
Tip of the iceberg.
Ebay's one job is to connect buyers and sellers and they fail miserably at that.
Not even a local minimum, a global minimum. Not a platform, a gated swamp.
Amazon search is in comparison much more... approximate.