- use camelcamelcamel to see Amazon price for the same item over the past year
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once you know the Amazon price, check the shipping cost and returns policy for the retailer you are considering.
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if the item is sold by zwaveproducts.com , smart home.com , homeseer.com , thesmartesthouse.com or other big home automation retailers and you were looking at that company’s price on Amazon.com (as in “sold by X”) then always check the retailer’s own site. Since they have to pay a commission to Amazon, you’ll often find it cheaper on the original retailer site, although there may be a minimum order size for free shipping. Zwaveproducts.com , for example, is almost always cheaper on its own site.
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look for coupons! Lowes, in particular, often has coupons for 10% or 20% off.