I have noted lately that there have been a lot of postings on EBay for Minelab GPX 4500 at ridiculously low prices from sellers with new accounts and few sales. I have sent several questions to the sellers pretending I live near and can I pick it up and pay for it. This is how I check out a seller. All were vague or refused In person contact. Legitimate sellers usually have no problem with that. Today I saw a listing for another GPX and the Lister stated that he will gladly supply a serial number to check authenticity with Minelab as there are CHINESE COPIES of the GPX being sold as authentic Minelabs. I Believe this because I thought the prices were too good to be true on quite a few listings. To all of you out there in our Forum, Be careful, I would guess its only a matter of time when a copy of an explorer comes around! Remember, If it sounds too good to be true, it probably is!