If you are looking to get a reasonably priced grill that will last you a good few barbecue seasons then spending between $250 and $500 is a good place to start. There are great models by Broil King, Char Broil and more to give you a good selection of grill with great features that make grilling easy.
Given that grills are often out in all weathers you definitely want to invest in one made from good materials, and of course a good cover to keep the weather at bay. Consider the cooking surface area that you need and the BTU rating will tell you how much heat the grill can generate too. These too together will give you a good idea of how much food you can cook at once.
kamado grill reviews 2014