Sorry, I'm keeping my stock battery as a spare for days when I'll be using my phone a lot and won't be able to charge anywhere. I'm sure most other people will do the same since it's pretty nice to have a spare battery sometimes. I keep mine charged and stored in my car.
Also, I'm pretty sure you can still get the extended batteries from Verizon for $25. They've never really went off "sale" since the Nexus launched. I would definitely recommend picking one up for that price even though the difference is negligible (in both charge and size).