Hi Pete,
I wish I could help you but I met the man only once while I was buying supplies during a trip. I don't have any idea what his name is. I was in the Woodcraft Store in Tulsa, OK so you might be able to call there and ask after him.
I would suggest you go check out some tobacco shops in your area and see if they have any carvings of this type and see what they sell for. You might also, if you find a shop you like their merchandise, take a gargoyle in and see how much they will pay for it. Keep in mind that retailers will sell it with up to 50% markup so if you want, say $60 from them, they will turn around and sell it for $90. If they can't sell it for that, they won't buy it from you.
Also, check out ETSY.com for more information. It's a great place to start finding information for people selling their handmade art. And check out Woodcarving Illustrated forum. They have numerous threads on pricing.
Jane