I really wouldn't bother with one mate
I bought one a couple of years ago for well over £200 and it was so annoying spinning round, the noise did my head in
I was talking to a certified Rolex Service guy a few months later who said he would NOT recommend leaving an auto watch in a watch winder, something to do with the oil inside the watch, and if you were using one a service should be done EXACTLY on the time scale recommended.
If you have a few auto's just wind them up when you need them I say, if you had a few cars you wouldn't leave the ones you weren't using running in the garage would you