I am in the process of acquiring parts to repair and upgrade a broken iPod I bought on eBay. Once I have all of the parts I will document my progress here.
Parts acquired so far:
As you can see from the parts list alone, the repair is requiring everything but the logic board replacing basically. I will hopefully be also experimenting with some Bluetooth functionality but that isn't guaranteed. The main modifications will be using an iflash quad adapter (purchased here) to increase the disk space to just over half a terabyte and also increase the battery life at least threefold.