Not a bad idea, but I don't think it justifies the cost, professionals are likely more accurate than an Xray.I'm no expert on pinched frames but I don't like the looks of the example posted. If I had the money to buy one i'd require an X-ray of the sight area before dropping the cash!
What don't you like with the looks of the one posted? You're welcome to your "no expert" opinion of course. But it clearly looks authentic (as well as can be seen in one photo at least). No one can authenticate from a photo.
It's been the case more than once that a genuine Colt is deemed a fake by an untrained eye only to find out later that they had passed up the buy of a lifetime!