I would wait until after they report early next week, one thing apple loves to do is under promise and over deliver, they keep there numbers very modest and always beat to the upside, also the numbers being watched are the ipad numbers and everyone is saying they are selling out like crazy, I would go short about 1-2 days after they report. I think the stock could climb to $315-$325 area, maybe even $330-$335 if they have just an unbelievable quarter, then I think it may be safe to short as you may be able to catch the downward pressure as people finally start selling for profits.
If it did drop to $250 I would be truly surprised.