As for this car's model year, I've chosen 1960 pretty much totally arbitrarily; the TR3A was made from 1957 through 1962. This might not even be a TR3A, since Triumph put the TR4 engine/transmission in the TR3A and called it the TR4B in 1962. If you're a Triumph expert and you're reading this, take a break from grappling with The Prince Of Darkness and let us know how we might identify the year of this car from the photographs below.
If this car is a TR3A with the original engine, then we're looking at a 2,016-pound car with 100 horsepower; the TR3B had a slightly larger engine with an extra five horsepower (and many fewer expensive crunching noises from the newfangled synchro-equipped transmission). List price for the roadster was $2,675 in 1960, or $32 more than a 1960 Edsel two-door. Which would you choose?