What this person I knew did was:
1. Go to china
2. Rent a cheap BIG diesel boat from the locals, with a crane rig to pull things out of the water.
3. He would simply travel up and down the shipping routes, find the containers, and either bring it aboard or tug it back to shore.
50% of the stuff in these containers is mostly clothes, name brand jeans, shoes.
Most of the containers are airlock tight so they have air inside and float.
I'm depressed no-one wants to persue this business venture
Back to my regular business then.