Game is getting to be nearly impossible to find nowadays, they used to be listed fairly frequently on eBay, not anymore. Kick myself for not preordering the title.
One ended not that long ago at $180+ shipping, and before that $200 (these were both times where I wasn't looking for this game because I didn't have the system yet). $300 to $400 is much too high. I think $200 is a reasonable offer on a complete one shipped.