I don't buy anything special for the snakes or stuff.....but recently we purchased two "trendy" pet store things for herps...
One was the Zoo Med cricket feeder for my roomates American Toad. This thing RULES! The crickets eventually come out one at a time, some stay in though and there is room for food/cricket water in there. Anyways it took the toad about a week, now she sits watching the hole waiting for a cricket or trying to find a good position in which to ambush them when they come out of the hole. Its awesome!
I also bought a Zoo Med magnetic rock cave. Half sits outside the cage half inside...its not *AS* cool as the cricket thing but I am buying another for a cool hide as well, since my leopard gecko loves it.