We heard last week that the Nexus 4 would be back up for sale from T-Mobile directly starting January 23rd, and it has shown up right on time. Provided you're willing to sign up for 2 years on a Classic Plan at T-Mobile the 16GB Nexus 4 can be yours for $199.99, or if you decide to keep it off-contract (seriously consider this route) you can have it for $499.99 after mail-in rebate.
We're not sure how many are available, but hopefully it's enough to at least let some people have their chance at the latest Nexus. As for proper availability in the Play Store at $299 and $349... who knows. Here's hoping that this new wave of stock to T-Mobile means there's more on the way to Google as well.
Source: T-Mobile; Thanks, Frank!