As I grow into this hobby, I will be picking up lots of equipment. I know two things, I can't afford all of what I want now, and I will outgrow some of my equipment. When I decide to sell some of what I aquire, how well does photo equipment hold it's value? I've heard you can resell lenses in mint condition for 75% or more of what you paid. But what about other things like camera bodies, tripods, light sources and filters? I know there is a broad range, I'm just trying to get some idea. This will help me decide what stuff I have to save for and what stuff I can "skimp on" now. Thanks!