I just received my e-mail from Robby.jp to pre-order the unmasked RAH Darth Vader - they are listing it for 11,700 yen ($103.37US or $121.38CDN) and expect it to retail for 18,000 yen ($159.02US or $186.66CDN).
It has to be pre-ordered by October 10th and will ship December 31st.
Of course, that doesn't include shipping, which won't be cheap coming from Japan.