But, they do not really sell it for bitcoin, because Bitpay will convert bitcoin into fiat currency and give it to Asto plaza devs.
But its a start. At least we are witnessing the the beginning of BTC crawling its way to the mainstream market places. I could also envision that BTC can used in auctions of valuable items for collectors. The sellers could be paid directly without the need for a middle man to handle the payment.