I don't know much about knives. I bought a "SOG 312 BIG heavy folding knife 5cr13mov" from eBay. The following link (google image search) should show some pictures of the product: https://www.google.com/search?q=SOG...folding+knife&tbm=isch&tbo=u&source=univ&sa=X The product was sold as a new SOG knife, it also has the SOG logo. However, no such SOG product seems to officially exist. The product somewhat resembles a SOG FATCAT, but for some weird reason has "flash tanto" printed on it. Product description and the logo makes the product a counterfeit... or does it? First I contacted the seller, who doesn't seem to think it's a counterfeit. Then I contacted eBay, who said "we will be requiring you to provide us a valid proof of your claim." Also eBay sets the following requirements: Proof must come from one of the following sources: •Manufacturer •Law Enforcement •Credible 3rd party appraiser I am not familiar with US law or appraisers. I did however contact SOG customer care, but they have not yet responded. At the moment I have 4 days left to send documentation to eBay. Any other ideas how I might produce a proof of counterfeit, considering the above eBay requirements?