Exotic: TVR Cerbera
TVR is under new management, and the older-generation models are being downvalued as they belong to another era. You can't get more exotic than a Cerbera, and late 1990s examples in private hands are being advertised in the £15,000 to £20,000 price bracket. In 2006, it will become increasingly difficult to sell these cars, so that means they are easier to buy. But beware; it'll also be easier to make mistakes.
Alternatives: Aston Martin Vantage, Maserati GTA