i have seen then go for as little as 15-20 dollars, but i have also seen them sell for hundreds. i saw two on ebay last month one brought over 800.00 and the other brought 1200.00. these are rare prices. you will have to find what the local market is . these bottles were embossed from smaller towns and i assume they are hard to come by.
You need to get that book by Bill Porter. I usually just check to see what's going on on ebay, but when I'm traveling I don't have a laptop and need something to kind of give me an idea of what ones' worth. His book is $12.95, you can send payment to: