A lot depends on the quality of the refinish.
Some can be pretty nice,,many can be pretty bad.
Once you get by that, it's mechanics,,timing, hammer notches, cylinder slop,,all those things you normally check for.
Hammer notches (correct and strong) is a bid thing to check. Having to either get them welded and recut or to replace the hammer with a Colt period replacement is expensive. $350 is a good amt to set aside for that adventure.
Some places will take your old hammer in for trade and exchange + cash for a rebuilt hammer.
The trigger can also have been worked over and now be a bit too short. Same deal, weld and rebuild, or replace.
If you have to hold the hammer back manually from it's 1/2cock position inorder to load or remove the cylinder,,either the half cock notch has been worked over , the trigger worked on,,or both.
Lots of things can be out of wack and the revolver still 'work'. Meaning you can cock it and snap it and the cylinder turns, ect.
But making it right to be a decent shooter can be expensive if you have to pay someone to do it. Fixing them yourself is not too hard but if you have to get into buying parts,,there's where the $$ can go quickly.
If it was a 41Colt orig,,then it was a 1st gen.
Having been re-cyl & bbl'd makes it a decent shooter esp in 44sp.
What can alter the value is wether the cyl and bbl are Colt parts and then if the parts are 1st gen or 2nd gen parts,,the cyl could even be a 3rd gen as it will work with a 3rd gen hand in a 1st or 2nd gen SAA.
3rd gen bbls will not fit the 1st or 2nd gen guns though. Colt went to a finer thread
(FWIW,,3rdgen Colt SAA bbl will fit in OM or NM Ruger BlkHawk frames)
In addition, if they are Colt parts,, Are they 'take offs' from a production gun or Service Dept & Mail Order parts?
The former will have the correct bbl address on top of the bbl,,the latter will have the bbl address on the left side.
Even if a 'take off' bbl, the bbl address styles changed during mfg and the correct era marking will most likely not be correct.
Of small consequence to a shooter most likely,,but some with a collectors mindset will find that a value downer.
The other type of bbl and/or cylinder would be an aftermarket source.
Numrich and places like Christy sold truck loads of bbls and cylinders (and other parts) for SSA over the years..
Christy bbls are usually marked in small letters as such under the ejector rod housing.
Pre-war Colt cylinders will have wider and longer cylinder flutes than post war cyl's.
3rd Gen Colt cyl will have a non removeable cyl bushing.
Do ser#'s match on the parts? Again maybe not a big deal for a shooter, but it is if the gun is drawing some of it's value as a 1st gen SAA.
Buffed off ser#'s & other markings on the parts is also a big no-no regardless of how bright and shiny the refinish is.
All that said,,and w/o seeing it,,it could a $500 almost shooter to a $800 better looking and better mechanics shooter IMO.
One persons idea of a decent refinish and how 'tight' the action is is vastly different from another.
A hands on inspection by someone that knows the SAA and the current market is really needed.
Putting nearly 1K into the gun and then some more to fix it wouldn't seem to be the right way to go. Not when used 2nd, & 3rd SAA's are out there for not a lot more money.
Neither will be an instant collectors item but I don't think that's the goal here.
added,
Those Hard Rubber Grips...
IF they are orig 1st Gen Colt SAA grips and in nice condition w/o cracks, chips or repairs (honest carry and use wear is OK),,then the grips with the orig screw could by themselves be a $350 item.