Bellchambers is a pretty decent ruck but no way in hell is he worth Hoskin-Elliot and a 2nd rounder. Pick 7-15 is also way too much to expect IMO.
I would say that's exactly what he's worth.
How many ruckman with his hit out ability can rest forward and remain a major threat. I mean your club traded a dud to Collingwood for pick 14.