(Image credit: Shutterstock) You’ve made up your mind: You’re buying a new TV, and it will not be expensive. Why? Because even a $350 TV is still $350. Fortunately, cheap TVs have never been better, and good-enough TVs have never been cheaper. You just have to know what you’re looking for — otherwise you might end up with a TV that frustrates you more than it entertains you. If you’re shopping for a new set and hoping to keep costs down, I’m here to help. These are the five features to look for when bargain-hunting in the TV aisle. Article continues below 1. 4K resolution We live in the era of 4K. Even though the majority of what we watch — basic cable, local news and most YouTube videos — gets piped into our homes at below 4K resolution, it’s time to embrace ultra-high definition. The reason for this is simple: Even if you don't care about fancy enhancements, any TV worth buying is a 4K TV.…