Situation Hopeless ! !
I tried to import a 12 year old Mercedes, custom designed, which I had picked up @ the factory in Germany in 1985, & used for 12 years; I went around & around with various customs brokers in POP.
* The DR Customs has a large book, detailing the current fair market value [by Dominican standards] of all cars sold in the past 5 years. Older than 5 years? There is no data! It is forbidden!
* When I explained, or tried to explain, the unusal circumstances with classic cars, I was told that I could import my "classic car", & find out what the duty was only after it physically arrived; then if I thought the duty was to much, I could pay 1/2 of the duty that Customs decided was appropriate; Customs would then "allow" me to ship it back to the USA - at my expense.
* I politely declined this absurd proposal.
* At the same time I also owned a 1974 E-type Jaguar, V-12, convertible! I didn't even bother! Easier to sell it & pocket the $ - which I regretfully did
* editorial comments: 1. why do Dominicans not understand why wealthy foreigners prefer to live in Mexico or Costa Rica. My little tale is 'Exhibit A'.
2. Excpet for Santo Domingo, I don't know any part of the DR where a British [or non British] sports car makes any sense whatsoever! For a number of good reasons; I've been here 9 years now. The DR bears little resemblance to the UK!
* I simply gave up; I storngly suspect that you will do the same.