Personally, I'm not convinced that it has been re-blued. However, if it has been re-finished, AND given that it has been converted to the safety mechanism...BUT given that you have the parts to convert it back to its original configuration, I think that four things are to be considered in 'fair price':
1) if the barrel length is the more desirable 4 5/8"(seems the shorter bbl is more preferred to many)
2) it's a four-digit gun
3) the .41Mag has become a 'cult' (read desirable) caliber amongst aficionados
4) the fact that you can sell it locally and avoid shipping (and depending on the state, FFL fees)
I would venture a very uneducated guess that a 'fair price' would be $600 (with the parts included); I would also guess that you could get at least $800+ with a tiny bit of marketing i.e. selling on our Forum; more on the dreaded auction sites.
Used to be you couldn't give away a .41Mag........... not so anymore!!!
IMHO,
J.