Discounts are 20/35/50% for 2/3/4+ items, can be mixed and matched with everything in the listing -it’s not just for multiples of the same item- and are calculated in cart.
The rest of the game parts are in a separate listing for shipping reasons
I have versions from both the 2008 and 2016 editions, which are the same except for the printed date (and case file envelopes used) but if there’s a specific one you want let me know.