The days of dodgy dealerships that clock and glue cars together are thankfully numbered. Most of today's motor dealers are mostly reputable due to numerous laws and regulations. This should warrant that the cars they sell should be of a decent quality.

Buying from a dealer in this day and age means you are covered by the Sale of goods act, which means that goods should meet an acceptable standard.

Reputable dealers should be members of a trade association. Look out for Retail Motor Industry Federation signs.

Franchised outlets usually have the pick of the crop and the best cars due to their buying power and they also offer the most comprehensive warranties. Buying from a dealer also let's you sort out everything under one roof i.e. Part exchange, finance and insurance. (Links)., so it works out to be very convenient.

There is one down side to buying from a dealer! You will have to pay the higher "Windscreen" prices.