I frequently buy rare seeds on eBay and have never questioned how genuine they are and generally trust that the sellers are honest people who like to grow stuff. I recently I had the shock of my life browsing through the seeds when I found someone selling some seeds for Giant Broccoli only they were using MY PHOTOS for to sell their product. They were not even using the image for the same type of broccoli. This person sells all sorts of seeds that claim to be 'giant" but obviously they just search around for the best images to sell their fake seeds. Be warned!