Sony Mobile has launched the Xperia X Performance and Xperia XA into the USA. The handsets are available through various retailers including Amazon, Best Buy, B&H Photo and Reagan Wireless. The Xperia X Performance costs $699.99 including a free 128GB microSD memory card, whilst the Xperia XA costs $279.99 with a free microSD memory card.
Whilst the handsets have already been available in the US market, most of this has been international stock. By buying through the above retailers, you will get handsets with official US warranty. All four colours are available for each handset (Lime Gold, Rose Gold, Black and White). You can find links of where to buy each handset below.