Look's like some type of "Chalice"(Sp) Kind of similiar to the one's i have seen used for communion.
I'd get a antique price guide like Covel's or Kobel's? To early for me still on my first cup of coffee......
I'm sure there are some guides at the library. Seem's like i saw something like it on Antique's Roadshow that was valued around 1,500.00 to 2,000.00.... with a story about how in the early day's during the Civil war, the churche's used to bury or hide the good stuff for fear of it being stolen. You might do a bit of research on the area see if you can find out about any churche's that used to be close, I'd re-check that spot real well, might be more? Great Find........Hope you find more?