Guys, hoping you can lay some good news on me with this one...

Just left a new local shop a couple hours ago, for which I went to get a new Glock 26 Gen 4 that I'd been wanting. While there I happened to look over and saw what appeared to be a 3" model 66 with faux ivory grips. Now I've been trying to locate a nice 66 for my mother, yes my mom...78 years old and cannot be talked out of a .357, mainly a 66 she wants. Long story shorter, I basically impulse-bought this gun and now that I'm home fear I may have paid too much for it, and want your guy's take on it. As stated, it's a 66-5, 3", in excellent condition, and he told me it was a Lew Horton Special. It has the faux-ivory grips, original box and all papers and receipts. It says on the original shop ticket that it is "1 of 293"....before I say what I gave, I would greatly appreciate hearing what you guys think would've been a fair price to pay for this...and any other info you would be good enough to share with me on this gun.