Hi, I'm interested in purchasing an affordable quad with some paddle tires to play on the dunes with. Doesn't have to be fancy or the fastest bike out there. It does need to be reliable. What do you all suggest and where is the price point on a used bike to get into the game. Here's where I want my cake and to eat it too. I'd like to do minor trail riding with it as well. At this point i'm not even sure the proper questions to ask. Thanks for any input.