always buy privately IMO, dealers can wipe their hands off you just as easy as a privet seller as my cousin has found out. if the car is sold as seen then if you drive it half a mile down the road and it blows up, your problem, alot of dealers will help you out as they dont want the bad press etc. my cousin bought a mondeo, got half way home and the auto box messed up and it was stuck in third gear, then the immob packed up and in the end he sold a car he paid £900 for 2 weeks later for £100 for parts. the dealer gave it all the big one he'd give him back his money, then started ignoring his called etc. he got in contact with trading standards and the only thing they suggested was take him to small claims, but he wouldnt be guaranteed his money back and if he lost he'd have to pay the fees. so in the respect dont ever think buying from a trader gives you more security as it will be down to the dealer and his/hers desertion.
like wise with a warranty, they half the time are not worth the paper they are printed on. ok, some dealers are good, and they can offer you things like 14 days free warranty and if anything happens in that time they will foot bills etc to convince you the car is good, but you pay a price for this.
when it comes to privet sellers, you get far more bang for your buck. ok you dont get warranties with privet sellers but you go in knowing what you are looking at, if you go in blind thats when you get caught out.
but what would cost you say £3k at a dealer will most likely cost you £1500 or less privately. you pay for for stuff you probably wont use from a dealer, like the warranty stuff, and like i said most of it you pay for and in the T&C most of it is void as soon as you leave the forecort or they say its only valid if you bring the car to us and service the car at our prices etc etc.
privet all the time for me thank you, it wins hands down, more for your money and just as safe as buying from a dealer