If you were going to sell 4-6 mid-grade (say $2000-6000 value) British and European guns at auction, whom would you use as the auction house and why?

I'm downsizing the accumulation and on-line listings (including a couple on this site) haven't been productive. Gunbroker, on which I've sold a number of guns of lesser value with penny auctions and no reserves seems not to be a good choice for guns of this nature. So I'm looking for recommendations.