The Radeon RX 460 features 14 CUs, it has 896 stream processors, 48 TMUs, 16 ROPs and a 128-bit memory bus. The base clockspeed is 1090MHz, with a 1200MHz Boost, and the card has 2GB to 4GB GDDR5 memory clocked at 7000MHz. The card uses under 75W of power and does not require a PCIe power connector.
There is no reference design so pricing will depend a lot on AMD's partners. The suggested retail price for the 2GB model is $109 but a quick look at Newegg reveals there's just one card selling for $109.99, everything else costs at least $10 more and some of the custom, overclocked cards with 4GB GDDR5 command a price of $169.99.