Scamming Seller on ebay

This individual tries to scam seller through extortion, false allegations, and auction manipulations. Then demands “real” gold or silver when this person has bought costume jewelry. Deceptive practices using the postal system and online auction site to commit this scam. Has tried this with other sellers as well. Takes items out of the auction wins then wants to return the rest. Sends malicious harassing emails with threats that slander to make a seller bend to her to give her free stuff.