Google checkout/wallet is possibly the worst product Google ever made (excluding products that were eventually killed). If you've ever used it as a seller you've probably come across multiple issues that are never solved despite many people desperately trying to contact google (mostly failing to contact any human being, let alone one that would forward issues to developers) about them. It's no surprise it couldn't handle shit. The team left Google a few months ago too (there were some stories here about it I think).

Here's what I get now when I search for Nexus 4 on the Play Store:

"We're sorry, there was an error. Please try again later."

They simply cannot handle this kind of event on their own.

If I try to check out, I also get this:

"An error occurred while processing your purchase. Please try again later."

Google IO tickets for the past 2 years.