I also attended the Horst auction this past Saturday. I didn't record the sale prices but I do remember a few of them. The price stated in earlier replies for the Lefever BE is correct. I looked at it but was not interested. The two other Lefevers (G and H) went for somewhere between $1100 and $1400, as best I can remember.
The person who bought the two W.C. Scott guns was a few chairs from me and I think he paid in the mid-$2000 range for each. Later today, I will copy the sales bill and once the prices are posted to the web site, I will post both for everyone. I will also post the e-mail and phone number for Horst Auction as well for anyone interested in contacting them.
The Belgium Regina went for about $1400 and I remember the Gibbs 12 gauge going for about $4500. The Charles Daly Lindner 185 sold for $3000 and the Fox CE sold for $3200. The Fox A grade 16 gauge went for about $4600 or so I believe. The best deals of the day appeared to be Fox Sterlingworths. Not sure about the two Parker G shotguns, but I seem to remember around $1200-1400 for each.
Elliott