A friend of mine just lost his job and needs to sell a few guns to raise cash. I offered to give him some money to help him out but he won't accept it. He did however offer to sell me his Colt Match Target AR-15. I already have almost the exact same rifle but I'm entertaining the idea because I do like the gun. I asked him how much he wants and he said 'just give me whatever you think it's worth'. Keeping in mind that my intention is not to take advantage of his situation, what should I offer? I cant' seem to get a good gauge on the value from gunbroker etc. Thanks for your thoughts.