Nc Photo/Getty Images We may receive a commission on purchases made from links. A conventional thermostat may not be a part of your home or business that you think about all that often, and maybe because you've never had a "problem" with it. But after a particularly grueling summer nets you a massive electricity bill , it makes one wonder if a smart thermostat from a major brand would be beneficial in some way. It's natural to have a bit of sticker shock from looking at online and in-store prices for smart thermostats; most of these devices are $150 or more, unless you decide to go with the base Google Nest Thermostat . For $130, the Nest isn't a bad thermostat at all, but it's not the only budget-friendly temperature regulator on the market. There's a small handful of smart thermostats that you could choose over the Google Nest entry model, and the most that you'll spend is $114 (plus tax) for one of the more advanced sub-$100 thermostats on Amazon.…