Let's see: I'm sure we can have a civilized conversation.
My toy buying ethics pretty much fall in line with my ethics in general when consuming anything. Basically, I am environmentally conscious, so I try to avoid buying anything I don't need and I don't drive and I pretty much walk everywhere I need to. This carries through from food to any other consumer goods. That being said, Toys are my only real vice. But even then, I try to limit what I buy to those figures I really want. (The fact that money is tight due to me saving for a downpayment on a home also helps me keep my toy buying to my absolute wants.) Even then, however, my wants sometimes get the better of me, since I do sometimes buy two of the same figure (one to open, one for MISB).
The only other rules I follow when it comes to toys is that I try to support local businesses first as much as I can. I am trying to avoid Walmart, due to my own personal political reasons. Unfortunately, this means one major venue for toys is cut off to me. So be it.