I was looking around for a fully functional but dinged up iPod Classic 7th gen, expressly for the purpose of gutting it and refurbishing it with new and upgraded parts. That part on its own went smoothly, but my only issue is that this was listed as a 7th gen iPod Classic, when in reality it's a 6th gen.
The first indication was the fact that I flash modded it with a 1TB microSD I had lying around... But the iPod only recognizes around 140GB or so. The 6th gen iPod Classic is the only one with this storage limitation, and having double checked the model number after setup (MB562LL), I confirmed that it was a 6th gen model.