I thought about this, and in the end it just didn't turn out viable with me with 2*Tax's, 2*MOT's, 2*Service/Maintenance, Running Cost etc, with all that added up, it just wouldn't make much difference in terms of the miles/selling my car when it comes to it.
All that being said - The only true shed I would buy is a Mk3 Golf. Strong Engine, Reliable car - Parts are easy to source, easy to carry out work your self. Fuel Efficient.
http://www4.autotrad...155tq?logcode=p
And that's petrol, few diesels on there as well.
If you are buying this to save your self money etc, you need to basically scrap the idea of going fast and looking good in it. At the end of the day it's a shed, and it's there to save you money, not to be a 2nd Zed. These are awesome cars!
Hope this helps.
Hope
**edit - Before I got my Zed, I almost needed to buy a cheap run around, and almost picked up a MK3 golf for around £200 - The head unit in the car was worth more than the car So they do come up cheap, Gumtree will be a good place for a shed. **