That was local retail price and I bought it specifically from Yodobashi Camera in Shinjuku, looking at the receipt I got it for 39,715 when I showed my passport, it was about 41735 with TAX. Not all shops give visitors TAX free shopping though.
You take the west exit out of the station. Leaving the station and walking straight ahead you should see Yodobashi Camera down the first road to your right. Unfortunately I didnt get the exact name of the street (very few street names are sign posted). The shop is mentioned in the Tokyo Lonley Planet guide as well as on their very handy maps (bring a compas though
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From what I saw it seems to be a pretty standard price for it right now. I've seen mention of being able to get them second hand around Akihabara but did not see any when I took a walk around.
On a side note, it looks like Shinjuku and Shibuya are better for electronics now than Akihabara as alot of the larger electronics stores are moving out to the two locations.