The BMW 6 SERIES (2004-07) 650I 2DR CONVERTIBLE 4.8 SPORT SMG AUTO is a large, premium four-seat convertible, aimed at buyers wanting open-air touring rather than everyday low-cost transport. In the UK used-car market it sits among luxury grand tourers, with more presence and performance than a typical family hatchback, and rivals include the Mercedes-Benz SL and larger cabriolets. Mycarcheck.com recorded 825 look-ups covering 224 different VINs, a useful level of interest, though these figures describe checks rather than total UK sales. The data shows an average private-sale valuation of £4,600, average recorded mileage of 98,000 miles, and around 5,000 miles driven annually. Checked cars averaged nearly six previous keepers. Best suited to couples or enthusiasts able to budget for upkeep, it is less practical for families. Its V8 and folding roof stand out, while the SMG automatic feels sporty. Fuel costs can be high, so check condition and service history.