I used to have one of these!
Well, the 13 is a K-frame, best suited for occasional .357 use and general .38 use. The Ruger GP-100 is more comparable (tho still larger and with a more solid lockup) to the slightly larger L-frame (S&W 686, etc.). I would feel comfortable firing either the L-frame or the GP-100 (even the small SP-101, given its third front-lock-up) with .357s all the time. The 13 is essentially the model 19 without the adjustable sights. I like the heavy bbl and the fixed sights - it reminded me of a mini Model 58.
I have taped to my computer monitor a 1.5" one-hole group I shot offhand at 10 yds with my model 13, and it is by no means the best group I shot with that revo. I found that (factory) Smiths of that generation had excellent triggers. I personally found this made them a little easier to shoot accurately than the (factory) Rugers.
You didn't say how the revo was priced. I sold mine (in similar condition to the one you described, only with LOTS and LOTS more rounds through it) to a friend for $135 (no longer needed the gun, and I needed the money) back in '98, I think. This was a very good deal for my friend.
I liked the model 13 a lot. If it's priced right, buy it.