I've been looking for them since. As I said, I live out in the sticks, and we don't see many out-of-state plates anyway, and the ones we do see tend to be populous or neighboring states.
Nor do I think it's the I bought a blue car and now see them everywhere. It's not like I'm seeing N.M. plates, and just not noticing them. It's a rare event to see any out-of-state plate. Maybe on the nearby freeway, but not at the local movie theater, which is well off the beaten track.
It would be equivalent to my wife saying, "Well, shooting stars were really important to me and my mom, and when I see one it's a sign", and that night, after humoring my wife and "talking" to her dead mom in my head, I happen to see two shooting starts. That would be an accurate prediction of a rare event, and I would (and mostly do) chalk it up to coincidence, but part of me wonders.
Coincidence can only take it so far. What if the prediction had been a N.M. license plate AND the car that had it happened to have a vanity plate that said "Althea" (the name of my dead mother-in-law) AND it was the same make and model that she used to drive when she lived with us, AND... At some point, the coincidence explanation becomes too far-fetched, but I don't know what that point is. On the far extreme, if someone predicted you would win the lottery if you played numbers X,Y,Z, and you played them, and you won, it wouldn't be rational to chalk it up to coincidence. Coincidence would be possible, but in that case, the odds are so long, that other theories would be more plausible. If someone passed a 50-card Zener test with 100% accuracy, it's possible it was luck, but that would be a terrible explanation.
I'm not putting the odds of what happened to me on those levels. Most likely, it was coincidence, but they were long odds, and the event came up twice within a very short-time frame.
I'm also surprised at the smarmy tone of some of the posters. I've been posting here for years, I don't have a history of talking about woo, and I had a strange experience, and wanted some input. I didn't ask to be made fun of.