Build quality for most of them are probably not as quite high as the Nexus 4, but the one I have at least is very well built.
In fact, if you limit the search on that site to 1G phones with Jellybean and 4.6-5" displays, you get a lot of units with prices significantly higher than the new price of the N4. And the ones that are cheaper seem pretty universally inferior (e.g. 480x800 screen, minimal internal flash, etc...)
Here you can find other name for searching (no affiliation whatsoever with this shop, I don't even know if they sell in US, it's only the place where a couple of friends bought their chinese smartphone): http://www.grossoshop.net/Smartphone_Dual_Sim_Android_Proces...
If you intend to keep a phone even at this price range for more than 1-2 years, you'll want to do your research both regarding build quality and upgrades. Though the brands with regular upgrades and "premium" build quality, like Xiaomi, are also pretty much as expensive as e.g. Samsung.
(But yes, don't expect to get much in terms of upgrades from the manufacturer. Your mileage may wary, but the ones that do upgrade regularly, like Xiaomi, are also expensive high end brands - Xiaomi wants very much to be the "Chinese Apple" for example)
Good to know some are, which one is that?
Thing is unlocked to boot, great for working abroad. Unlocked iPhone, what, $650-750, no?
Having ditched OSX for Linux a few years ago, Android just makes cents, literally, lots of them ;-)
$100 refund by the looks of it.
You'll have to wade through the support prompts, but start at:
https://support.google.com/nexus/4/
and click 'Contact Us' to get to the form.
Edit: you'll need the order number and the device IMEI
Props to Google for it being an automated process, not so much for total lack of promoting the refund.