It is late and I have nothing to do so I might as well answer your question. You can have a brand-new oil tanker built in the Faroe Islands for about 4 million USD. Here are the stats:
Type Double bottom oil tanker
Dimensions 80,00 x 15,40 m
Class Bureau Veritas (or equivalent)
Main engine 2560 Bhp (2 x 1280 Bhp), Caterpillar or similar
Cargo tank cap. Cargo oil tanks: 3800 cbm
Slop tank: 50 cbm
Bunkers Fuel oil: 150 cbm
Fresh water: 50 cbm
Ballast: 500 cbm
Accom. 15 persons
Various This is a double bottom oil tanker, suitable for carrying oil products (flash point more then 60 deg. C) for unrestricted sea service and in complience with current international regulations in force for tankers.
Delivery time 13 months
Price idea region US$ 3,9 mill.
Go to any shipbuilding company's site and they will probably have some info.