I would agree with Alex on the range of prices, but I would say this watch should go closer to top end of the range, because the bezel looks in nice condition. That shows how price is very subjective; I don't care too much about the bracelet, but bezel condition is really important to me as it is much harder to find a GMT with a nice bezel... but maybe for other guys the bezel is not critical.

Anyway good luck, I have to say the GMT Autavias are among my favourites.