Sounds like a descent bike. The Miyata 310 triple butted frame is a good frame. Flip flop hub? What is the other cog? Well, that doesn't matter much you can always put on what you want. If it wasn't a single speed, I would like that bike. But I don't know what they are asking for it. And like the post above, you should check to see if it fits you. Just because you are the same size, doesn't mean it will fit you if it fit the seller.