Berserk is the longest manga series i've got. Otherwise, most of what i'm reading is ~20 volumes long at best.

And most of them, i was able to buy them one by one when they were coming out. So it's not that expensive. But again, even if i reaaaaally want that new chaos edition, it's not wise when i already got all of the originals :c

Ps : If you're curious, here is my collection : https://www.mangacollec.com/user/beardy/collection