Lowes currently has their GE Z-wave plus switches on sale. When you stack these with the current coupons ($20 off $100, $10 off $50 or 10% off), you can achieve the following prices depending on how many you buy.
On/Off Switch [lowes.com]
($27.99 w/o coupon)
1 - $25.19 (10% off coupon )
2 or 4 - $22.99 ($10 of $50 or $20 off $100 coupon)
($34.99 w/o coupon)
1 - $31.49 (10% off coupon)
2 - $29.99 ($10 off $50 coupon)
3 - $28.32 ($20 off $100 coupon)
Slickdeals Lowes coupon thread
There is a current frontpage deal
for the on/off from amazon for $29.32.
One disadvantage of the GE z-wave switches is that they need a special add on switch to be used in a 3-way switch. Others like Involli [amazon.com]
or Zooz [thesmartesthouse.com]
can use a standard switch, though it does require figuring out the correct wiring.