Reddit mentions of Lone Wolf and Cub Omnibus Volume 1

A lot of these are pseudo-random/not in a particular order (like vol 20, 21, and 22), but there are often 2-3 in a series that qualify. I also found some (listed at the bottom) that weren't part of this deal but had coupons to use to get them for an immediate discount.

RWBY: Official Manga Anthology Vol. 1 & Vol. 3

Rurouni Kenshin Vol. 7: Includes vols. 19, 20 & 21 & Vol. 9

Dragon Ball omnibuses: Vol 5, Vol 13

Tokyo Ghoul: re, Vol. 11 & Vol. 8 & Vol. 13

Radiant Vol. 5 and Vol. 6 - Is this even technically a manga??

Mixed 3-for-2 and coupon deals within a series (but you should probably collect these series in their box sets to save money):

Bleach, Vol. 64 is $8.68 - $2.02 coupon.

Bleach, Vol. 68 & Vol. 69 & Vol. 70 & Vol. 73

Bleach Box Set 3: Includes vols. 49-74

Naruto (3-in-1 Edition), Vol. 23: Includes vols. 67, 68 & 69 is part of the 3 for 2 deal.

Naruto, Vol. 67 is part of the 3 for 2 deal.

Naruto, Vol. 72 is $8.45 - $1.79 coupon.

One Piece, Vol. 76 is $8.66 - $2.00 coupon.

One Piece, Vol. 77 is part of the 3 for 2 deal.

One Piece, Vol. 78 is $8.36 - $1.70 coupon. Same price as vol 76.

---

Interesting stuff part of the 3 for 2 deal:

Shigenori Soejima: Art Works Vol. 1 & Vol. 2 - From Persona artist Shigenori Soejima.

Lone Wolf and Cub Omnibus Volume 1

Final Fantasy Ultimania Archive Volume 2 and Volume 3

Oh yeah, that's it. When they posted it was out of stock on Amazon. Glad to see I didn't pick up the last vol. Hey /u/GogEguGem, your dream has come true: https://www.amazon.com/dp/1616551348/

The best thing I've ever read is Lone Wolf and Cub by Kazuo Koike and Gozeki Kojima. The English edition series has now been issued in a group of 9 omnibuses. At $16 a pop, that's a significant outlay, but you won't be sorry.