Haha, I knew somebody would ask that. It's kind of arbitrary from the view of the players, but roughly speaking, that's about 15 items worth, or 5000-ish gold, but that's just current weights/values of stuff. I can say that it definitely is worth it to just collect them passively as that weight will never change, it will be 25 no matter what. The alternative effect on the Health Points will also make it worth it once that stuff is in for battling.
Maybe though, I should just make it percentage based, like each item will give you an +0.1% on top of your ranking.