Forgo the brand name and look for "best gun quality" and the price plummets. Buy a lesser known Continental "best" gun and pay a 1/4 of the cost of the equivalent London Best made by one of The Big 4, Purdey, Boss, H&H or Woodward.
I'll throw this out there. Arrizabalaga provided guns to J.Roberts in London. Some of those guns were finished and assembled in London by London craftsmen. Regardless of where they were finished they are high quality guns.
I got to handle a J.Roberts/Arriz gun that was a copy of a Churchill Premiere, had 'J.Roberts, London' on the top rib and the Arrizabalaga name on the locks. That was a very fine gun and I regret to this day not buying it.
Here's link to an old webpage with the models and prices from the past.
J.Roberts Arrizabalaga 
