How often would you genuintley use it mind? Is it worth not owning a car and just hiring a car on those occasions or is it comething you could do with having avaliable to use at a moment's notice? Even if you need one for the latter, depending where you live this lot might be able to help:
http://www.zipcar.co.uk/ or
http://www.carplus.o...a-car-club-car/Or this could help if you sell or keep:
http://www.whipcar.com/Purely personal opinion but for a vehicle that's only going to get used occasionally I'd buy something much older which very little depreciation - mpg isn't really going to be too much of an issue if you only do limited mileage and without being cynical, any car with £30 Vehicle Excise Duty now won't have it in the future as the government will want to push emissions limits downwards. Also, presuming you have a good driving record, will something like a 5 year old Ford Focus (just as an example) cost significantly more to insure than this Ford Ka?
Another thing to consider is if you keep your BMW for say the next three years, will it work out any more expensive than replacing it with the Ford Ka (after accounting for depreciation, which you've taken the hit on with the BMW and would be doing the same with the Ka).
Also, another thing which I keep telling people and Parkers agree with, don't get lured into buying a diesel for perceived cost saving - they only work out cheaper with big mileages or ifbought as a company car for tax reasons. Only other reason to buy diesel is that you prefer it - will find a link for this later.
Really, I've hardly helped you here at all, but hopefully I've given you something to think about - what's the details/age/condition of your BMW?
Edited by fruitandveg, 10 January 2012 - 09:12 AM.