Blue iPod Nano 7th Gen 16GB has Bluetooth for Sale in Huntsville, TX - OfferUp
Amazon.com: M-Player Compatible with iPod Nano 7th Generation(16gb Space Grey) : Electronics
Amazon.com: Mini Bluetooth Receiver for iPod Nano (7th Generation) - Wireless to 3.5mm Jack Hands-Free Car Kit 3.5mm Audio Jack w/LED Button Indicator for Audio Stereo System Headphone Speaker : Electronics
Useless life hack: Don't want to Bluetooth mod your iPod but still want wireless music? Just plug in an iTrip, buy an iPod Nano 6th or 7th gen, then tune the radio