main reason, money. i have been working at a small fish store for a year and a half and i was let go recently because of the great economy we have. so now that i dont have my discount and extra income (was my 2nd job) i have run out of resources. i sold it for 300 bucks :/ rip off for me, i had it listed for about a month on craigslist and just kept dropping the price. i love this hobby and i loved the fish store because i could help customers with their choices on crafting their reefscape. but i plan on purchasing a new tank once i am more financially set ha. i still have a few tanks to play with just sitting at home. but this chiller is just sitting so might as well help one of u out to a sweet deal