People really love these plug-in hybrids and electric models. Electric vehicles and plug-ins are becoming more and more mainstream, while the incoming wave of luxury EVs from Audi, Jaguar, Porsche, and others will bolster electric sales even more. EV sales may falter when the $7,500 tax credit runs out, but that remains to be seen. For now, plug-in hybrid and EV sales have been increasing, and Inside EVs has been keeping score. The electric-focused publication has tallied up plug-in and EV sales now that we are more than halfway through the year, to find the 10 best sellers of 2018 (so far). It is worth noting that GM and Tesla don't provide monthly sales figures, so these numbers were estimated. There should be no surprises at number one, where the Tesla Model 3 slots in as the best seller. Tesla moved 18,305 Model 3 sedans through May of 2018, and has finally reached its production goal of building 5,000 cars per week. At number two, the Toyota Prius Prime sits as one of only th...