Christies and Bonhams charge 25%, Holts charge 22.5%, all figures plus VAT on commission at 20%.

It does not matter which you choose - H&H Royal or Purdey self-opener. You will pay less for a 'Royal' generally, all things being equal.

Don't buy either purely as investments.

Buy the one you like shooting. Shoot it, look after it and be privileged to go afield with a gun of real character and quality.

If you decide, in fifteen years to move it on, if looked after you will get your money back. You may even make a profit. Whatever, you have been using one of the best guns in the world for fifteen years 'rent free'! Not bad in my book.