The whole concept of a drop-top is that it should be stylish and desirable. Add to that the excitement of a high-revving engine and you have a car very few can resist.

M3 Cabrio Okay, so winter may not be the best time to buy a convertible but look at the crop of second-hand drop-tops we’ve found this week.

Powered by a naturally aspirated 3.2-litre straight six, the E46 BMW M3 cabriolet delivers driving thrills by the bucketload and the best part about it is that examples can now be bought for less than £15,000. Need proof? Well, take a look at this unmolested 02-plate with its folding soft-top for £13,000. It has covered 38,000 miles since new, and you rest easy because the Bavarian comes with a full BMW service history, MoT and four new tyres.

Another German powerhouse is the previous-generation Audi S4 cabriolet, which has space for four adults and a big boot. If you can afford to juice the 4.2-litre V8 engine then look into it, because the rapid cabrio looks like a stellar secondhand buy; values are sitting close to £10,000. We tracked one down; it’s an 04-plate with 75,000 miles on the clock and comes with full leather, electric seats and climate control for a mere £12,500.

Residual values for the 996-generation Porsche 911 are down, meanwhile. This is the cheapest modern 911 that money can buy and we spotted a T-reg Carrera 2 cabriolet with 42,000 miles showing on offer for just £19,000; that translates into big savings on a car that was £70,000 new.