Elvis autographs are common for sale at eBay.com. But you need to be careful if you want to buy one of them. It’s very difficult to authenticate because he had many variations.

Elvis signed with his name from 1950 to 1970.
If you are planning to buy an Elvis autograph signed with gold or silver paint, don’t do it, It’s false. That kind of pens did not exist before Elvis' death.

Ask the vendor for the history and background of how he owned the autograph.

Ask if Elvis signed it in person (Elvis secretaries said that they signed for Elvis many fan items). If the autograph is in a album, postcard or poster look at the date when this item was printed. Elvis rarely sing his name separately; his name usually looks like one word. “I” letter from Elvis is never a dot.  Elvis handwriting is a rush.