Asking US$100, plus postage, which will be between US$25 and $40, depending on the service used.
I would be very surprised if anyone has ever ridden in these shoes- the minimal scuffing on the heels and cleats suggests that the previous owner tried them on, walked once across the room, then retired from racing.
There is no size marking that I can see. I usually take a 43 in Vittoria, Maressi etc and these fit about the same.
David Benson Auckland New Zealand