because usually although not in this case the Jap ones have nice leather seats and other fancy options most of the UK cars don't have unless they are special editions. Jap cars are often low mileage which is why people flock to them although I would personally be wary as it's pretty easy to clock a car with a Japanese service history, must be very tempting for the dealer when the put the new clocks on... The Eunos generally has a lower value than the equiv UK models however, some of the top Vspec etc special edition Eunos go for good money. Personally if you can afford it I would also go for a Mk1 UK special edition as they hold their value very well and have a high level of trim.