Reading an old review of the AP Royal Oak 15202 form 2009.
The retail back then on a 15202 was €8,500 apparently - about £7,500 at the 2009 exchange rate of 1.13~ish to the pound.
Current retail for a 15202 is £19,200. I make that about 12.5% per year compounded.
At £7,500 it is a great buy. At £19,200 not so much.
Still ,you gotta charge what the market will bear...