Looking for an inexpensive device with NFC

I am evaluating possibilities for a potential project and one of those possibilities involve a mobile device with integrated NFC.

It doesn't have to be a phone, but it has to be readily available in North America.

The Nexus 7 comes to mind, but it's a bit on the expensive side for this project and something closer to iPod Touch size would be ideal. It should be decently fast, but performance isn't much of a concern.

So basically there are three requirements: integrated NFC, 7 inch or smaller and around $150. Android isn't a strict requirement, but I'd rather stick to a widespread platform.

Any ideas?