Way to pull a Bitmain.
$499 is the asking price, why don't you make a reasonable bid?
On a serious note, if you're going to tie the price in usd to the exchange rate of BTC, why not just price it in BTC? Then you won't have to update the post as often.
Pricing in BTC might make it either too expensive in $$ or too cheap if we plunge back down.
I actually adjusted the price only once (less than 5% in $$) during the 18% BTC rise in the last 48hr. I think that it is very reasonable.
If BTC will go down significantly, i will adjust the $$ price accordingly.