I have a silver 505 and a blue 500, and I prefer the latter because I'm left-handed and have turned the leather case 180 degrees from its original position allowing me to hold and push the page turn buttons all with my left hand. Works very well.
B&H Photo sells the blue 505 for $259 w/free shipping:
http://www.bhphotovideo.com/c/produc...ital_Book.html
Edit: Oops, didn't see the last post. Oh well, hope this helps anyway.