I am not sure the exact number of cards in each box, but it's safe to say at least 3000+ in each box. I did not count each box.   I bought these from an estate sale.  From what I have seen so far, the dates range from 1970's to about 2005. 

You will find cards from all the manufacturers:  Fleer, Upper Deck, Topps, Panini, Donruss, Bowman, Score, Leaf, more.   There are rookie cards, sets, parallels, serial numbered, based set, collector editions, checklist as well as cards from the top athletes!  I am pretty sure this person had a retail location at some point, so you will find some duplicates in there.   

I have not gone thru each box but from what I have seen these cards are in mint condition.   There are too many to take pictures of what's inside each box.   I am selling "as is" which is by team, I'm not pulling out certain cards to make a set or lot.  Grab a box of your favorite team for yourself and see what gems are inside!