One thing mentioned about the cables: Do you have to create entries online under your FBA account for every item you ship, or can they figure that out for you? I have tons of cables and other things I'd like to sell that is in good condition, but me spending hours upon hours looking up every model of cable / cheap item I have isn't worth my time.
The items I have that barcodes I'm not worried about, it is the rats nest of cables that I have really no idea what type they are that I'd like to offload and make .50c just to get them out of my hair and not feel bad about throwing them away.
My company has sold a large amount of recovered cables (including terminated and non terminated cat-3/5/6) to an e-waste company for scrap. If you have more than a pound of cables, this might be an attractive option.