I could be wrong but it doesn't look to me like XB1 is selling too well, but that's just based on my anecdotal experience.
- Anecdote 1: I have been trying to sell an unopened Xbox One - Day One on Craigslist for a week and no takers, even though I'm asking below retail price.
- Anecdote 2: On Saturday I was at Toys R Us and they had XB1 in stock with a big sign at the entrance. There was a queue stretching half way around the store to check out. I didn't see anyone with a XB1.
- Anecdote 3: Today Amazon had XB1 in stock and from what I observed it sold 40 units in 4+ hours. A few days ago the PS4 sold over 700 units in 4 hours.
- Anecdote 4: On eBay you can tell from sold listings that PS4 is selling 4.5X more units than XB1.
Ofcourse Amazon + eBay are going to be less important to XB1 since it's in stock in a lot of stores, but still those are some significant gaps.
Anyhow, I live in a big metro area and Craigslist is usually a great place to sell stuff. I have listed things like a TV or a car and sold them in a day. The inability to sell an XB1 priced below retail makes me suspect the $500 price tag is stopping people from rushing out to buy XB1s.