Sounds like excellent advice! Think I might take pictures of the system while sitting on the homebrew app and FBI apps.I think the following words triggers some eBay filter when I used to sell modded 3ds consoles.
CFW
Firmware (yes even writing the word firmware for an unmodded 3ds got it taken down)
Luma
Modified
I would put more effort in the photos and take pictures of the home menu full of games and in the description just say, "anything unsure, send me a message".
By the way do you think if I put "Custom software" that would work?