1973 Chevrolet Corvette C3

Corvettes from this era might still look the part, but are more for your ageing rock star. By 1975 output of the base model’s 5.7-litre V8 had fallen as low as 165bhp (though weight had gone up significantly) and the 7.5-litre big-block had been consigned to the dustbin. A year later the poor-selling convertible joined it. That of course means a big-block or convertible (or both) ‘Vette from this era is worth more than a small-block coupé. Strangely, despite all this, sales of Corvettes continued to rise, which also contributes to their bargain prices now.

Information from Octane Magazine.