6. Know Where To Re-Sell
There is a good chance your shit isn't gonna fit if you've never had experience with the brand, so while you may have luck on eBay to resell, there is a better chance on menswear forums whose members may appreciate your items a little more. Plus, they won't have a problem paying premium for it. Look into the Buy/Sell sections of Superfuture, 5th Dimension, Styleforum or even the Hypebeast forums to drop off your ill-fitting Japanese threads.