GLASS'S experts give the lowdown on what’s selling and what’s sitting

Going up

AUDI A3 SPORTBACK

Demand outstripping supply for this more useful derivative. Premiums of £1,000 over three-door.

FERRARI F355

A modern classic – even seven-year-old examples fetch up to 50% of original cost new. Spider convertible especially popular.

AUTOMATIC SUPERMINIS

For small cars such as Nissan Micra and Toyota Yaris, examples with automatic transmission are relatively rare, so demand is high.

Going down

PRESTIGE 4x4s

Now easing in value to more realistic levels – need to be properly specced (sat-nav, leather, big wheels) to sell.

WHITE

Despite what the pundits are saying, unlikely ever to be a popular colour again (a possible exception is some niche sports cars).

CARS WITHOUT AIR CON

Even in a poor English summer, cars without air conditioning are harder to shift.