I was shopping around and I found a real Sony 8G Pro Duo for $127.99 on Buy.com. Normal price is $137.99 with an instant $10 off (if you sign up for a Google Checkout account during the checkout process - free) and free shipping and handling. Best price I've seen so far, not including the ones on eBay which are probably fakes anyway. I checked it against Nextag and it beats the next cheapest one by $3 which may or may not include shipping and handling. I bought one today as an early Xmas present to myself, hehe.
Here's the link:
Remember you have to sign up for Google Checkout on Buy.com to get the additional $10 off. The sign up form will not show up if you are using Firefox (at least it didnt for me on Firefox 18.104.22.168), I had to browse to it using an (ugh) Internet Explorer tab. FYI.