quaking tombstone

Has anyone had any experience with this prop (link below). I've got a guy willing to sell one for $365 shipped. It's 6 foot tall and shakes but not sure if I should use it in my yard as the centerpiece or if that's too much money for what you get. Also I'm not sure about it being outdoors on teh grass as it hooks up to an electrical outlet...not sure if it's outdoor safe. Any advice is welcome:
http://www.youtube.com/watch?v=7Nc4Mhd7I74