I'd say you got a very good deal. I wouldn't hesitate to buy them off of you for that price, especially with all of those magazines.
The 422 would typically go for between $225-$300 I'd say, but in unfired or nearly such condition, and a "target" model to boot...I'd say it'd be at the high end of that, perhaps even more. The 2206s usually bring around $275-$350...but the 4" may be a bit less common, perhaps worth a bit more.
I'm quoting the prices I've seen in my area. Other parts of the country may vary, obviously. Also, prices usually include only 1 or 2 mags per pistol. You didn't mention boxes...certainly having the original box adds to the value, probably $20-$50 per pistol. I'm not sure what a fair price for extra mags would be, but I'd say your 9 "extra" mags (over the standard 2 per pistol) should be worth at least $15-$25 each...which really puts the icing on your purchase, I'd say.
Color me jealous.
Tim