Working on a 350F yesterday in my driveway, and the guy doing the chimney next door asked me how much it was worth. "$20 grand?" he asked, then asked me if it was for sale. Yep, I answered...
A lot of times I get folks who have a vague idea about what they're talking about, including those who claim to have had one, but are always off. "What year is that Cb550? 1969?" "I had a '72, but it was a supersport." Not worth the time to correct them but it always makes me wonder if they've got a bad memory or if they're bull#$%*ting.
My snappy comeback is when I'm driving my '64 Plymouth drop top. Always get the "what year?" or "is that a '59?" or whatever, and usually from someone driving a Corolla or a minivan. I answer, then ask them, "hey, is that a 2004 Corolla? That thing is sweet! 1.8 liter?"