Talk:Volibear/@comment-5112222-20121205205823/@comment-4087140-20121205220551

has a combine cost of 995 gold, which gives you 420 health and the unique passive. By, 420 health is worth 1108 gold; by , 420 health is worth 1050 gold.

So you get a large chunk of health for an appropriate price, and then get massive regeneration for free. I think it's quite cost-effective.

Stacking a single item several times, on the other hand, is rarely a good idea.