Personally, I’d be more apt to buy one if it was numbered lower like for a class H-4, H-5, or H-6. They seem like a closer match than the 734 H-7a or 840 H-9 brutes.
#406 is nice
http://www.northeast.railfan.net/images/wm406s.jpg
#456 looks good except for the pilot
http://www.northeast.railfan.net/images/wm456sa.jpg
#605 looks real close
http://www.northeast.railfan.net/images/wm605s.jpg