I'm pretty sure Xbox One has gone on sale for $199 and even less numerous times.
Yes.. only sometimes when some retail decides so .. only in some regions
I am talking about worldwide official price cut.
Remember 2009 ones ? when they annouce official pricecuts for both consoles worldwide the sales just explode.
That I am talking about.
Of course in this point in time they will not explode such massive but still, official permanent worldwide pricecut have much bigger effect than some small temporary pricecut for only some stores in only some country.