There is a scam selling misc. marine electronics. Most notably, GPS.(Thats what got me)  They are locate in China and will require you to send money via paypal or even western union. There products are usually selling for a fraction of a normal price. You may find bizarre feedbacks left by usernames containing *** in their name. ( P***L). If the price is to good to be true for NEW electronics.........Chances are it is a scam.  Beware !!