AWESOME! Gold is SO much fun to find. You can find melt values here:
Scrap Gold Weight Conversion and Melt Value Calculator
Just weigh it, and put in the weight.
Also, be aware that you can easily get 75% melt value selling it... Higher than that, and you'll have to do some looking. Selling to a refinery, you'll probably have a harder time, (they'll look higher on the return value, but you have to calculate shipping, refining costs, etc).
Basically, for a 10K ring of this size, I'd guess about $20 - $30 in melt value. $15-25 in sale value.
Some folks elect to sell finds like this for spot on craigslist... you might find that works, too.
Last thing, if you intend to keep it, you can polish the ring easily by putting a small rag around a drill bit (let it wrap slowly), then turn on the drill at high speed with some car wax on it... hold the ring against the polish/rag as it spins and slowly turn it. It'll buff out all the scratches and make that baby really glow. It'll look like new when you're done!
Cheers,
Skippy