...i don't know if this will be of any help to you but:
http://wiitracker.com/
best buy isn't on that list, so i guess this is just general info if you are really out of options. this how i got mine. every so often the more reasonable $250 price comes up, though it is still a bit rare for that to happen, and even then, when it does, they're quickly sold out. check back every now and then and see what pops up. you never know...