This is a very competitive price you have here. How did the antenna get broken? Other then the broken antenna, are there any other problems with the TX and RX? How's the range on it and do you get glitches running on carpet? Do you guarantee your item if I do buy it, meaning if it gives me problems, are you willing to take it back and give me a full refund. If not, then I am just better off buying new. Thank you.