Yes, renaissance revival ca. 1875. Do you have any photos of the arched crown piece sitting on the headboard?
Do you have a link to that $12K bed frame? I'd like to see what that looks like....
I'd say yours is worth between $500 - $1000, depending on where you are and the condition of the side rails. It's typical that the side rails would be the most worn portion of the bed frame.
These beds were typically made to be approximately full sized, so be sure to check and see if yours wasn't extended so that the inside rail dimensions are now queen sized. Queen mattresses are about 60 x 80 inches. If so, that could help the value a bit.