Don't make the same mistake my crew made and discard these thinking they can't be sold... it was only at the end of the night, parked at Reaper's Hideout, we had a few left... and I wondered... and was right, they can be sold and for around 1K gold, even empty.
I just assumed they couldn't be sold like the normal storage crates and we'd been throwing them away earlier as we had a load of them. I reckon we missed out on 20-30K at tier 5 RB.
The Cannonball Crate of the Damned can also be sold empty.
