Check out http://www.gavingardiner.com for the next sale

Lot 110 is a no.2 Holland & Holland amd Lot 112 is a Purdey, they may come into your price range. I could have secured you a very nice 1921 H&H Royal for $15,000 at Holt's last month.

the advice from some about considering a best gun from a maker with lower 'brand recognition' is sound.