I know that the overall weight capacity of the 2x4 KALLAX is 25kg but I'm looking to know what the capacity is for each shelf/cube in the unit. Wondering if a cube can hold a 19lb box or if I have to jig everything around to put it on the bottom inst...

I have a 2x2 KALLAX and where I've just moved to I want to add some bigger KALLAX units. With the new units in place I wouldn't really have a place for my 2x2 so I'm curious about the buy-back process. I want to see what it would get valued at but I ...