I get a fair amount of questions on these figures.
First off, they're by Megahouse and are about 3,800Y each. They've been out of print for a few years now, and the best place (if not the only place) to find them is on ebay.
Secondly, I did some research and found out that they're being re-released as "Premium Figures NEO." Ok, that's an odd title, but it's good that they'll be available. The figures that will be re-released are Luffy, Nami Series 1, Ace, Nefertari Bibi. I have no idea why Zoro, Sanji, Usopp, Nico Robin, etc. aren't being re-released. Luffy and Nami, I believe, were issued for re-release first, then it was announced just r