I wouldn't let anyone get you down about authenticity. I collect antique engravings and have bought a few on ebay. Yes, there is an enormous amount of fake everything sold on ebay, but if you have done your homework AND YOU are satisfied, that's all that matters. I have a friend who also collects antique engravings and frequently gives me grief about my purchases from ebay and the pieces supposed authenticity...until I came home with the documentation from the fine art library showing the exact edition, date and number of my "fake" Rembrandt etching, which he now expects me to sell to him on the cheap cause that's how I got it. Enjoy your find and let the naysayers do without.