The Nexus 5 release date could be as early as late October or early November according to emerging reports.
To clarify, the most recent teasers floating on the Net suggest an announcement date is due in October/beginning of November. The last word in the grape wine is October 31st for both an announcement and release date. Apparently, everyone is talking about so that must be a substantial sign that something going down with the Nexus 5.

Looking at the price tag on the Nexus 5 on the release date, Google plans to minimize its price on the Nexus smartphone line. That translates to a Nexus 5 price tag of $350 off contract.

That price is geared for the basic 16GB black model; incidentally black may be the only color available at release. When you think about it, the $350 is about half of what you would pay for flagships such as the Apple iPhone 5s.
Taking a quick walk-through, the Nexus 5 absolutely stunning, fast, and piled with a plethora of awesome features such as LTE fast connectivity for an improved browsing experience. You can bet the Nexus 5 is the right handset to demonstrate how fantastic the Google universe on the Android platform.

A quick look at the specs reveals the Nexus sporting a Snapdragon 800 processor, a 1080p touch screen, and a battery that lasts and lasts. The Android 4.4 KitKat combined with the Nexus 5 should be a surprise.
Nexus 5's specifications are top of the line. More than that you'll find this Nexus to be reliable and performance-centric and this makes the smartphone even more appealing. It might have a couple of flaws or you might get extra functions in a $400 phone. But analysts say that the Nexus 5 is the "best unlocked phone on the market."

source: CNET.com: A comparison of Nexus body dimensions