The exception to this is untradables, I guess for obvious reasons.
How does that help you?
If you paint a whip using the Barbarian Assault reward, it becomes untradable. You can easily clean the paint off at a later date so you can sell your whips.
^This would require you playing a lot of BA (or paying someone to play it, either way), but it would result in you not losing all of your money.
