$320 USD incl. shipment from China.
What made me choose it over anything else? To that I must first answer another question: First of all, why go for a different phone, when I already had a rather good one, the HTC Evo 3D? Battery life. It was a rare day when I did not have to charge the phone early in the evening/night, and I do not play games a lot (when averaged it would not be more than 5minutes a day). All the phones up to or at around $200 with larger battery offered pretty similar or only slightly better features than my Evo3D (like HD display + larger battery in the JiaYu G3, or HD display with similar battery in Umi X1). For some time my favorite for upgrade ws Lenovo P770 - significantly larger battery, but otherwise almost the same as Evo 3D.
Then I came acros the N2 and learned that for ~50-60% more compared to the Umi or JiaYu, and for roughly the same as the P770, I could have a "machine" with performance to spare (the Exynos 4412 chip is either at the top of the race or very close to it), is well supported by development (unlike the new HuaWei quad core chip, whose graphic part is not supported well ATM), does not have AmoLED display (I'm not a fan there of at the current state of development. I've seen quite a few burned-in displays around me), has a larger display (4.3" of the Evo3D started feeling small, as I was using the phone more and more for reading, browsing, emails...) but still is comfortable to be used one-handed, and has a large battery which should provide it with relatively long battery life. Basically, that I could have a Samsung flagship for half the price.
It's true that I don't need the 4-cores performance, that 2-cores like in the Umi or JiaYu would be sufficient most (>95%) of the time, but it also means the unused cores can sleep and therefore lower the battery drain, prolonging battery life. In my opinion (and I might be completely wrong in this regard), the Exynos 4412 using only 2 cores should be more power efficient than the 2-core MediaTek MTK 6577 chip.
Also, on HTC Evo 3D I was using CyanogenMod ROM (agrabren's CM10 Disarmed Toaster), and was reasoning that since the N2 has that Exynos for lower price, some skilled developer would catch on and port some of the SGSIII ROMs to the N2 - IMO the community around that phone should grow well and fast, in my opinion more than the community around the Umi or JiaYu, or the other phones (ZTE,...)