Retail-shelf-friendly options, from simple front-door video intercom kits to IP-networked, wireless multi-camera systems, are gradually earning real estate in some CE chains and on many of the big-box stores' e-tailing sites. The intended audience: do-it-yourself consumers and small-business owners who are looking for low-cost alternatives to custom installations, according to multiple suppliers. There are currently a number of options on the market at price points less than $500.There are some very reasonably priced kits out there, but don't overestimate the effect that it will have on your security ...