welllll it was about $70 on ebay. I just got it today. Took about 2 minutes to install as I already had the reservoir and pump waiting for it. Um I dont LOVE it...theres no clear way to determine where the high and low water lines are...and I dont trust suction cups. I think it will do alright as long as I keep an eye on it and the reservoir and the specific gravity. It's definitely going to save me a lot of trouble!