I think that's a pretty good deal.
I have the original wood grips for my 651 but want to preserve them so I replaced them with a pair of Pachmayr J frame Grippers I have.
Let us know how it shoots and what you think of the 22 mag cartridge. As I mentioned in my post #4 above, I bought a 351C and decided that I liked the 22mag cartridge. I'm not saying it is the ultimate man stopper but I think it is much more potent than a 22 LR.
BTW don't feel too bad about not getting a 22LR cylinder. Most didn't come with it.

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Accuracy supercedes Speed