There are many collections out there but I haven't seen hardly any based on Wolf's Rain so I thought I'd take a picture of mine. :]

-collector's box w/ episodes 1-5. OST 1 and a kiba plush.
-messenger bag w/ phone holder.
-official manga box.
-manga volumes 1[x2] & 2.
-Black Wolf's Rain Kiba T-shirt.
-playing cards w/ original sketches, designs, etc. from animators.
-OST 2
-DVDs 1-7. [volume 4 x2 and volume 6 x2]
-Official Wolf's Rain Art Book with original character designs, sketches, etc.
-Wall Scroll with Hige, Kiba, Cheza, Tsume, and Toboe.