My, what a scandalous title for a discussion. If you are one of those folks who spend a tremendous amount on gear that you then take out once in awhile and state "look how nice a camera I have!" and once in awhile get out and take photos that you think are awesome but are really a waste of a perfectly good hard drive then yes, I can understand your anger that a few individuals who waited awhile managed to find a deal online.
As someone who actually uses my 5D3, I certainly have no remorse. Since picking my camera up in the beginning of April I have taken over 20k shots, travelling with it to Dubai and Tuscany and getting a number of shots I would have had no chance with on my old 5D2 or 7D.
If I wanted to I could easily sell these shots to make up for the drop in price. Seriously, rather than concentrate on discussions like this, just get out and photograph.