One year subscription! Get a new easy-to-grow mushroom grow-bag species, and a new seasonal carving every 6 weeks (approximate grow cycle of most mushroom species). When one bag is about done with good harvests, a new species arrives, with a new hand-carved piece! From bears to owls to mini doors and gnomes, you'll collect 9 carvings and experience 9 different mushrooms in a year. A great gift for your mushroom enthusiest! 
$500 gets you $675 in grow bags and carvings, a one of a kind gift that continues year-round!