I started browsing swedish websites for cars for sale and soon found one which matched my criteria. Except for the engine which was 6 cylinder 200. The car had a nice looking price tag, so I called the owner.
The seller told me honestly about the car. It did not have power top, power brakes or power-anything. The convertible top needed to be replaced and the condition of the floor pans was not good. The car had been fixed and painted poorly in the US before the seller imported it to Sweden. I didn't have to check VIN to discover that this was not one of the collectors' most wanted Mustangs. However, the car was registered and inspected in Sweden, so it could legally be driven in Finland as well. At least for one summer. We agreed on the price and I decided to buy it. I booked tickets for a ferry to Sweden and a trailer from Stockholm to haul it to the ferry harbour.
There she stood (ironically parked on the place for the handicapped). Just like the seller mentioned "looks good from distance of ten meters". I took a short ride around the block, removed the swedish plates, drove it on the trailer and fifteen minutes later we were on our way back home.
We had "some difficulties with the brakes of the trailer" so we ended up with leaving the trailer to the sidestreet in Stockholm and driving the un-insured, un-plated Mustang with leaking top and malfunctioning heater and blower to the ferry and over the border without no-one asking a question.
Now the car was safely in the ferry and we could get away from Stockholm.