Not exactly the sexiest car on the road, but if you were to drive round your local car in this BMW Isetta 300, you'll get more attention than any other BMW around.
Originally dating to 1958, the car was bought in the UK, then shipped over to Poland for professional restoration. Check out the pictures on the site for many shots of the finished vehicle, it really does look like something special. It's even got the original number plate.
Downsides? Well, obviously not everyone wants to be seen in a bubble car and the 297cc engine and distinctive seating and door might be an issue. It's also still in Poland, but the seller says he will deliver anywhere in the UK. Viewing will mean a flight to Gdansk though.
Oh yes, one other big problem. It's up for £9,500 on a 'Buy it now'. Although the seller will take an offer.