I found this on a market analyst site.

"A travel charger when exported to markets demanding CE or UL approvals will be sold at 40 cents to 70 cents each, FOB. Chargers without any approvals can go for 30 cents to 60 cents each, FOB."

Yes, really, the price of a safe cell phone charger is only 70 cents when bought in some quantity. You save a full 10 cents on an untested and probably unsafe type...