So, I'm fairly new to collecting G1, and I know that a lot of older figures are prone to yellowing and sun damage. Presently, I keep my collection displayed on a shelf in my living room (adjacent to a window). That window's blinds remain closed almost always and a thin curtain is over them. So, I'm not sure if I should be worried about yellowing or not. Should I move them? Is the occasional filtered sunlight too much? Was Breakdown this creamed-colored when I bought him? The paranoia is creeping in. I guess I'm asking how much is too much?