If you do not feel like spending $300 to $350 on a Nexus 4, T-Mobile is offering the Google handset for $49.99 with a two year contract. The deal is for new online customers only, and includes a $50 mail-in rebate. If being locked into one carrier is not your thing, the Nexus 4 is still available unlocked from Google Play. Shipping times are listed at 2 to 3 weeks for both the 8GB and 16GB model. The 8GB model is $300, and the 16GB model will cost you $350.
Google has not released any official numbers on the Nexus 4, but a group of XDA forum members have estimated at least one million units have shipped, based on some interesting IMEI (International Mobile Equipment Identity) math.