One easy way to get a rough idea of how much time is on one, check the sharpness of the lines on the seat, and make sure it's the original cover and hasn't been redone. Ya see, the lines on the S, and the SX are still sharp, compared to the Red. Works on most everything else that had a lined seat to begin with.
This is my trike. There are many like it but this one is mine. My trike is my best friend, and it is my life. I must master it as I must master myself. My trike without me is useless. Without my trike, I am useless. I must ride my trike true. My trike and I know that what counts is not the amount of miles we ride, but the time we ride together. My trike is human in it's own ways, therefore I will learn it as my brother. I will learn it's weaknesses, it's strengths, it's parts, and it's soul.