>>1495651i feel like he actually gave you a pretty good answer though
He's 6", it's an XL bike. Probably like a 58. Because there are decent photos of it, you can tell by the headtube and where his saddle is.
Bike sizing is imprecise. It's not possible really to get a much more helpful answer than that. You could have asked him to measure a specific tube if you wanted to know too or just go ride it and see how it fits you.
Plus a non-comprehensive add serves to drive the price down. People are welcome to not put effort into selling online and in return they can get less money. It's good for buyers.
