I was telling in another thread about some DD's a guy had close by to me. He has no idea what model they are he bought them from a local shop awhile back. He here on leave and told me if I wanted them to come pick them up he said he would take 300 for them. My question is if they are the lowend models are they worth that or should I go down the road? I havent had any DD's or even seen any in reallife just wondering what I should look for and how can I tell what model they are I had plan on atleast taking them out of the box to look make sure they arent chewed up. But im guessing magnets will tell me just by the size and weight. But is there any other inducations that will tell me are they marked on the back?