Okay. The apartments in Dubai are items you can purchase and are actually priced in bitcoins on their site. I'll accept that you found one that shows prices in bitcoin. I'd still bet that they are actually pricing their apartments in dollars, but will accept bitcoins at the current exchange rate, but I'll admit that you did actually find a place somewhere in the world posting the price in bitcoins for something they are selling.
The other site doesn't seem to be selling anything other than trying to sell listings on their website. Or maybe act as a go-between between sellers of luxury items and buyers wanting to pay in bitcoins. Or maybe they're looking for feedback on whether that is a business model that anyone would use. I'm confused by their site, but I'm pretty sure that one would NOT count as somebody offering anything for sale priced in bitcoins.
One day, years from now, it will be fully adopted and the BTC price won't need to be linked to the USD for prices.
There will never come a day when people are barred from buying something without converting their dollars into bitcoins first.
You are too focussed on dirt world goods. In the virtual world, growing inexorably into the matrix, the purchase of goods will be crypto currency for crypto good. A crypto good could be a piece of artwork with an embedded public key. You buy the private key. The digital art can be copied of course, but nobody else can verify the good except you, with your private key.