Shipping the USB key isn't 100% fraud-proof.
If you think the point of Bitcoin/Litecoin is being able to transact with it quickly and easily over eBay, you might want to look into the other things you can do with these new currencies.
If you think the point of Bitcoin/Litecoin is being able to transact with it quickly and easily over eBay, you might want to look into the other things you can do with these new currencies.