Auctions in the UK are a fair place to start looking and getting prices. Go to
http://www.holtandcompany.co.uk, click on "online catalogue," click on the "on-line catalogue" button, click "view," scroll to the bottom of the page and go to lots starting around 1100 or so. scroll down the pages and page to higher numbers until you find some drillings. If you come to shotgun pairs before finding drillings, page below lot 1100. They are there. Read through them. The sale is tomorrow, so you are unlikely to get one off this auction, but this will start your research. The estimates are usually in range of hammer price. However, multiply the estimates by 2.8 to account for exchange rate, buyer's premium, and shipping.
Get back with questions about what you are looking at.
