When looking at old S&W revolvers how much does the original box, tools and paperwork increase the value?

I know that’s all up to the buyer/seller but is there a percentage to consider?

Rule of thumb for me is a $100.   Sometimes it more of a selling it quicker than for more money.

Honestly, I'd rather it didn't come with the box and all that stuff. When I get that stuff, I feel a responsibility to take care of it. So now I have a huge stack of boxes taking up space.

I buy the gun, put it in the safe, put the box of OEM crap on the stack and never look at it again.

I guess that's why the buyer pays the extra $100, it's a storage fee for taking care of all that crap!  

IMO..
$10-$2000
Generally $100-$300 but…

Age, rarity and condition ? Just like the gun.

Imagine a near perfect matching serial number box for the single best condition factory tuned, factory engraved, royal blue 2.5" colt python or even something 100+ years old..etc.

The people who only collect the absolute best of the best available want it because it complements and completes the package as originally delivered.

So..full circle to. What’s my rare gun worth ?

Well..unless you have something so unique/rare that there aren’t any listed for years on gun broker or through one of a handful of auction houses.
You are not collecting anything true collector nuts care about enough to pay top money for. You are only wading around in the average collector space. Probably under $150.

You either agree it makes a difference or you don’t and only care about the firearm.

That's why I don't get worked up about having to get the boxes. I can't afford to buy the rarest of the rare or guns in pristine condition. I can, however, afford tools with character-though, I do prefer them in as nice a condition as possible. I'm not paying even $100 more for a gun with a box unless the one without the box is in much worse condition than the one with the box. In fact, of my 14 or so S&W wheel guns, I've only bought one which came with a box. It's a Model 642 built in 1999 and came with the blue plastic box.

If the gun is mint / near new, then the box adds value but if it is an average wear shooter grade gun, I don’t think much.
If a gun comes with a box I save it and send it with the next purchaser.
I think especially on auction sites it does serve to drive the up, by how much is the question. The perception ( which I share honestly ) is anyone who cares enough to save the box, probably took real good care of th3 gun

It's primarily dependent on the rarity of the gun and secondarily the condition. A matching box and tools for a high condition Registered Magnum could add $1000 or more to what a collector would pay for the gun over a similar, box-less example. But it adds little to a used Model 10 or Chief's Special, and almost nothing on a newer gun unless it's a rare version and the box proves the provenance.