my original (and cheapest) quote on my IS200 was £1470 in 2007 as, despite my age (25), i'd only been driving 6 months, and have a claim, and don't live in a particularly crime free area
I went with Adrian Flux for the second year as they were the only broker to quote me under £1000 (Equity Red Star), which was over £200 less than everyone else at the time, including interest as I had to pay monthly (£91pm)
this year the renewal is £812 single payment, or £93 monthly for 10 months, so I got a fresh quote from their website and it came back £518! I rang them and they have slashed the £812 to £517, thats correct, they have just knocked £295 off my renewal quote, simply because I phoned them up, and the only detail I changed was that the car is valued less this year, and they weren't pushy in any way, they simply said they'll post the quote in writing for me to check the terms and so I can shop around while I still have 2 weeks to renew
Just thought i'd share my story
:D