Saiyuki takes after the Chinese buddhist novel "Journey to the West". I have to say that it is easily one of the best anime/manga products ever!! This list is meant to maximize Saiyuki collections, therefore I will be listing next to all of the products that even associate with Minekura Kazuya's beautiful adaption!

DVDS
I will begin with DVDs:
'Saiyuki - Journey Begins (Vol 1)' ~Vol.1 -The first 5 episodes. 1-5
'Saiyuki - Old Friends New Enemies (Vol. 2)' ~Vol.2 -5 episodes. 6-10
'Saiyuki - Confronting Their Demons (Vol. 3)' ~Vol.3 -4 episodes. 11-14
'Saiyuki - Storms (Vol. 4)' ~Vol.4 -4 episodes. 15-18
'Saiyuki - Sting of the Scorpion (Vol. 5)' ~Vol.5 -4 episodes. 19-22
'Saiyuki - Demon Rising (Vol. 6)' ~Vol.6 -4 episodes. 23-26
'Saiyuki, Vol. 7: The Gods of War' ~Vol.7 -4 episodes. 27-30
'Saiyuki - Soldiers of Destiny (Vol. 8)' ~Vol.8 -4 episodes. 31-34
'Saiyuki - Children of Sacrifice (Vol. 9)' ~Vol.9 -4 episodes. 35-38
'Saiyuki - Trouble in Paradise (Vol. 10)' ~Vol.10 -4 episodes. 39-42
'Saiyuki - Following the Scriptures (Vol. 11)' ~Vol.11 -4 episodes. 43-46
'Saiyuki - New World Order (Vol. 12)' ~Vol.12 -4 episodes. 47-50
'Saiyuki: Requiem' ~The movie.

RELOAD DVDS
**a word to the unknowing: saiyuki: reload is not like the originals.
'Saiyuki Reload - Volume 1' ~Vol.1 of reload -4 episodes. 1-4
'Saiyuki Reload - Volume 2' ~Vol.2 of reload -4 episodes. 5-8
'Saiyuki Reload, Vol. 3' ~Vol.3 of reload -4 episodes. 9-12
'Saiyuki Reload, Vol. 4' ~Vol.4 of reload -4 episodes. 13-16
'Saiyuki Reload, Vol. 5' ~Vol.5 of reload -4 episodes. 17-20
'Saiyuki Reload (Vol. 6)' ~Vol.6 of reload -4 episodes. 21-24
'Saiyuki Reload (Vol. 7)' ~Vol.7 of reload

BOX SETS & COLLECTIONS
'Saiyuki - Journey Begins (Vol 1) - with Series Box and T-Shirt' ~Vol.1 + box & t-shirt
'Saiyuki, Vol. 7: The Gods of War' ~Vol.7 + box
'Saiyuki Reload - Volume 1 + Series Box' ~Vol.1 season 2 + box
'Saiyuki - Double Barrel Collection (Vol. 1)' ~contains eps. 1-10! darn i wish they had this to begin with! -10 episodes!
'Saiyuki: Double Barrel Collection 2' ~contains eps. 11-19. -8 episodes.
'Saiyuki - Double Barrel Collection (Vol. 3)' ~contains eps. 20-28. -8 episodes.
'Saiyuki: Double Barrel Collection 4' ~contains eps. 29-37. -8 episodes.
'Saiyuki: Double Barrel Collection 5' ~
'Saiyuki, Vol. 6: Double Barrel Collection' ~

BOOKS
Next are the Books (manga):
*note: i will only show the english versions
'Saiyuki, Vol. 1' Book 1
'Saiyuki, Vol. 2' Book 2
'Saiyuki Vol. 3' Book 3
'Saiyuki, Vol. 4' Book 4
'Saiyuki Vol. 5' Book 5
'Saiyuki, Vol. 6' Book 6
'Saiyuki, Vol. 7' Book 7
'Saiyuki (Saiyuki)' Book 8
'Saiyuki (Saiyuki)' Book 9
'Saiyuki Reload 1 (Saiyuki Reload)' Reload Book 1
'Saiyuki Reload 2 (Saiyuki Reload)' Reload Book 2
'Saiyuki Reload 3 (Saiyuki Reload)' Reload Book 3

ARTBOOKS & GUIDEBOOKS
Books (the art books):
'Salty-dog I: Kazuya Minekura Illustrations Vol. 1 (Salty-dog 1. Minekura Kazuya Shin Gashu.) (in Japanese)'
'Salty-dog II: Kazuya Minekura Illustrations Vol. 2 (Salty-dog. Minekura Kazuya Shin Gashu.) (in Japanese)'
'BackGammon: Minekura Kazuya Art Book (in Japanese)'
'TV Anime Gensomaden Saiyuki Official Fanbook 2 Vol. 2 (TV Anime Gensomaden Saiyuki Ofisharu Fanbook 2) (in Japanese)'
'Saiyuki Reload Gunlock Official Guide (Saiyuki Reload Gunlock Official Guide) (in Japanese)'
'TV Anime Saiyuki Visual Complete (Gakijoban Gensomaden Saiyuuki Visual Complete) (in Japanese)'
'TV Anime Saiyuki Official Fan Book (TV Anime Gensou Maden Saiyuuki Ofisharu Fanbukku) (in Japanese)'