After long conversations with ProtonX, I think it’s time to cut to the chase.
For a while, this DSi devkit has been a main focus in the DSi community (mainly for a NAND dump).
https://wiki.mariocube.xyz/index.php/Japanese_DSi_Developmen...

Right when a well-known dumper was about to buy this devkit, another buyer was first. Nobody currently knows who owns this. For the record, I don’t want to buy it, a NAND dump is more important to me- for archival purposes.
If anyone has this unit, please send me a PM or a DM via Discord (Trash_Bandatcoot#5927). This is very important to us and we’ll continue hoping a dump will surface one day.