Just thinking about it really. My current watch is not keeping time well. It was left to me by my Nan and i really like it. It's an Omega. I've spent hundreds on having it serviced over the last 5 years and it never improves. I still wear it but then look at my phone to tell the time. 
I would like a second hand everyday watch (i don't see the point of spending lots on something only for special/dressy occasions).
I don't really have a clue about where to go for a good second hand watch and i don't want to trust ordering something over the internet.