A very big question in very few words. I have a strong aversion to old cars and old British cars in particular because I hate unreliability and I hate messing around with rusty old wrecks that won't run properly. Especially in winter. If you are interested in an MGB, then you really need to read up on them specifically. Avoid late 'rubber bumper' cars. The best places for bargain buys are classic car auctions, where you may pick up a distress sale by the widow of an enthusiast who froze to death greasing the nipples of his old crock over Christmas. However, be aware you will always be bidding against professional 'classic' car dealers and the car you are bidding for may, in fact, be one of theirs. Since you can now pick up a 2-year-old MX-5 1.8 Option pack for less than £7,000, I can't see the point in all the grief of a 30-year-old MGB.