Possible remedial measures

The design of these laser pointer is used only for treatment at 5 MW power from 10 mw.The seller to modify the laser pointer by increasing the power from the battery to the laser diode and diode laser beam emitted from the more powerful.The problem here, diode not used to dealing with a higher power, may have a shorter life cycle, and may burn.Many eBay lose their rights or burn laser completely in a few hours or even minutes.The lens in the laser pointer acrylic paint is not used to increase strength and may damage the performance or incomplete.
These eBay sellers are not expert in laser and generally have little or no understanding of the laser pointer they sell.This means they cannot provide level and service recommendations and support qualified they can provide the minimum.They generally responses to customer problems, laser pointer is the ship back to replace.Considering the cost of the laser is not more then freight costs, the majority of customers to reduce their losses at this point.
Possible remedial measures
Laser pointer with the power of 5 MW is classified as dangerous goods, not allowed in eBay.If you are a seller of them, you can threaten to report their eBay and they may have their account suspended or even close.
If you pay with PayPal, you can also open a dispute described goods without.Disputes may not good for you but most sellers willing to issue you a refund at that stage.If you pay with a credit card, you can start a charge back with your credit card companies in a similar way with a greater chance of success than paypal.