There are 50% off coupons being emailed weekly lately, you just need to sign up for it.
http://www.logitech.com/en-us/footer/subscription-management?ClickID=dbbsww2noywztnr0zsxrhrm2xkwykz2n2yoo
Not sure if they will send out more, been 3 batchs so far though, save an extra 25$ off that price if...