I wish it was for me. I bought mine from PC Nation about six months ago. Searched this one out for a friend of mine.
OK- here's a trick... I just scored one in Boca Raton Fla. If you have an area where someone will be kind enough to pick one up for you, you can pay over the phone and authorize another person to pick it up.
Go to Bestbuy.com and find the Zumo 550... Go zip code by zip code, or state by state...it will show if any are available. Then call them to CONFIRM they have it and have them fax you the Auth form. I found one yesterday in Durham NC, but they wanted the 899 for it, so they are out there.
I paid $539.99. Not as good as $499...but about $100 better then I have found anywhere else.
Also, they would not honor the coupon since they are on clearance already.
Good luck