Hypothetical: I buy a product imported legally from the US and later sell it on the local used market to a Chinese tourist who takes it back to China with them. Where is the crime, smuggling, or 'banditry' here? US law is just that - US law.
If the importer didn't have the intent of it going to the tourist, then things are fine for that one-off GPU. If they did have that intent we quickly get to smuggling territory, with or without you as a middleman.
And for GPU trips without a country in between, the plausible deniability is close to zero.
