An unsold Ruger #3 action at $795, I can surely understand such! frown
I have one in 45/70 and a nice little SS for what it is. But not just an action in that price range. Not considering by the time pieced together even doing the work onesellf, upside down in costs most probably.
If to build a custom rifle, the #1 action the vehicle of choice and even then, likely I'd try to buy one with rechambering possibilities to mitigate costs.
Were I the O/P, I'd just sell the rifle with full disclosure and be done with it rather than trying to milk every dollar. I do wish him luck, whatever!
Just my take.
Best! John