I bought a bunch of old DMG-03 rechargeable original Gameboy packs with the goal of restoring them by cleaning and replacing the internal batteries.
So far so great, but no one is buying them.
I'm getting ready to move out of the country and can't keep all of these. I just need a couple for my chip-tune rig.
I bought them for around $10 each, the new batteries cost me $9 and I'm only charging $10-15+ for the labor cost involved. I've had to reject a couple of the original packs because the leaked batteries created too much corrosion on the circuitry.
I still have 10 or so to list but I'm in the process of cycling the batteries.
https://www.ebay.com/itm/Restored-Gameb 2707878454
https://www.ebay.com/itm/Restored-Gameb 2715253748
https://www.ebay.com/itm/Restored-Gameb 2707814828
Best,
FriendlyReminder