Estate Sale - Help / Advice

Hi Everyone, I have an uncle who has an apartment absolutely overfilled with beautiful artworks, figurines, sculptures, limited edition books, etc. and he wants to get rid of ALL OF IT!

Some of the stuff in his apartment is highly valuable and some of it isn't. Hence, I need some help in trying to distinguish what can be valuable or not. Does anyone have any advice?

I feel like the books are probably the easiest for me to distinguish if they're valuable or not through google search. A lot of them though are in spanish. If anyone knows of a book store or rare collectors that could be interested in the books, please let me know!

Thank-you!