I lived in Podunk, Arkansas; so the one time I saw a Turbografx was at a mall across the state when we were visiting friends of my parents. I had no idea it was worth a damn at the time because, although it was a demo unit, some wise guy had put Sherlock Holmes in... I have a vague memory of poking at it for a couple minutes and then walking away disinterested. I highly regret it now.
You'd think I would eventually happen upon one again, given that we'd later move to Hot Springs, where there was an extremely prolific collector / game store owner; but nope, I didn't rediscover the system until I moved to Japan for the 2nd time in 2009. I couldn't believe that I was still playing NES (and occasionally renting a SNES or Genesis) when I could have been playing games like Ys I&II. I'd kill to go back in time and be able to experience it when it was new.
I was the right age, just in the wrong geographic location.