I call dibs on the $18 Dual Shock 4 if it turns out he accidently took the wrong picture. What's this thread's policy on dibs? LoLz
Already sent him a PM before you, but who knows if he'll be responding.
There's no real policy on dibs; it's all based on who completes their transaction first, and that's dependent on the buyer and seller.
Edit: Saw your Dualshock 4 bit... yeah, I doubt he'll be letting go a DS4 for $18 shipped. I'm just after the DS3.