two things:
CREDIT
RICH PARENTS
Or the obvious one, work hard in a decent paid job.
I did, I had to buy and insure all those cars myself and worked my arse off for it. If you can afford £7K+ for the car and then £3K+ a year on insurance at 19/20 you either dont have any kind of life, or are getting money elsewhere.
I had a great life. At 17 years old i was in a well paid job and working my arse of for extra cash wherever I could. My parents havent got alot of money and I dont live in a huge multi million pound house. My saxo cost me 5k and insurance was pricey. The c2 i bought when i was 18 cost me 12.5k and my mini cooper s jcw cost me around 18k when i was 19. I worked for every penny to afford these vehicles and people are too quick to assume that young people dont earn alot of cash. I'm not gonna boast about how much I earn but I worked my balls off to earn the money to afford my cars and my lifestyle. I bought my zed at 21 and it wasnt a cheap one like some youngsters are buying. Even now at 23 I'm still knocking my pan in and I will be very quick to defend myself when people say stuff like the rich parents/credit stuff.
Enough bullshit from everyone I think and yes it is possible for young people to afford cars much better than these.
Another member on here had his nearly new zed at 18, and then an r35 gtr @ 21, he is a good friend of mine and has also burst his arse to get the fancy things he wants.