Use code E17DIM31 to buy 3 and get 1 free. Can be used for multiples if you need 8 or 12.
Free shipping on all orders of 199, so you can get 8 of these for 299.98 and get free shipping.
The email I got says expires WEDS 9/28. But that is Thursday. So, plan on this expiring Weds, although SH is pretty good about extending their deals on their own, so I wouldnt be surprised if this is active until Thursday regardless.
I will not say this is the lowest price these have ever been, but more than 20% off on Insteon is usually worth it if you are in the market. The only way to get a better deal would be to get the rare deal like on Labor day when they ran 25% off including refurb and multipacks. Only seen that pop up once in the last few years.