Funny you ask, Dr. B; I was just in one of the local SoCal stores (Tustin Marketplace) and all the "good" stuff's still only at the 10% mark. I asked the floor manager and he said that "as long as stuff is moving at 10% off, that's where they'll stay until it gets really close to the end".
Considering that your only recourse for repairs is to send it back to the manufacturer and that all sales are final, it's just not a good deal. Who's also to say that prices didn't go up some percentage before these "Everything Must Go!!!!" prices, too?