My 2007 Fjestads Blue Book states 975 at 70%, 1150 at 80%, 1600 at 90%.
Flaydermans states around 425 for "very good" for most variants and up to around $1500 for excellent for "excellent."
He also states that Billy the kid was carrying one (however it was a lightning) the night he was shot by Pat Garrett, and that John Wesley Hardin was known to have carried the Thunderer.
Blue Book states subtract 15% for nickel plating. In my opinion, bluing looks nicer on these. It is pretty well agreed that these have fragile mechanisms.
Some of the readers of this post will remember I found a rare variant, a .32 Rainmaker, which was kind of like hitting the lottery. The guy I sold it to loves them and tells me he is very knowledgeable about fixing these up as they are a strong interest of his. Don't know about his credentials but could find his info if you need it for anything.
In my opinion, you have a sharp looking gun, looks the wear is nice and honest from what I can tell... Thanks for sharing.