Try the boards here... Try the boards elsewhere even, but I'm a big opponent of going to someone who's ripping you off. Definitely give it a go, keep your eyes peeled for one that pops up on the boards around the net though.
These were clearanced at some Target stores, they wound up being that abundant, so keep your eyes open... Also keep your eyes on our threads for Target exclusives as they come up because often we discuss the DPCI #'s in the threads and that's how I usually get anything from Target. Saves a lot of time/trouble...
If you're out of the states, network... Often one of the guys on the boards is willing to help if they're financially able to.
Personally I debate the value of the figure at just its retail price... It looks cool, don't get me wrong, but I'm just a hard pressed person to happily pay $15 for any action figure like this.
For the record, it's the Clone Wars SA Clone sculpt iwth a new head too, for anyone curious on where its origins are from.