But even normal wear and tear mean that, a few years later, leaks might be a problem. This can be true even of some convertibles that have a retracting hardtop.
An alternative is to choose a car that comes with a removable hardtop, or go to the aftermarket for such a top.
Trouble is, Murphy's Law states that it will never rain when the hardtop is in place and will always rain as soon as you've taken it off ...
The budget: About $25,000
The shortlist
Honda S2000
Launched in 1999, the S2000 remained in production for a decade, widely appreciated by enthusiasts for its overall performance and handling.
We're looking at the AP2 version introduced in 2003 with an improved suspension and drivetrain.
The high-revving engine took a bit of learning to drive well - peak torque wasn't developed until more than 6000rpm - but, when mastered, provided quite thrilling performance.
A downside is that it's scarce compared to the other two cars; a really good one might take some hunting down.
From $23,000
Mazda MX-5
Japan reinvents the "traditional" British roadster. And what a job they made of it. The MX-5 was a huge international hit when launched. Well over 20 years and three generations on, it's still the one to beat.
We're looking at the third-generation NC that appeared in 2005. With this came the option of a clever retractable hardtop that didn't interfere with luggage space when stowed.
The MX-5 is a hugely appealing and well-priced car. Those with a removable factory hardtop as part of the deal carry a price premium.
From $20,000
Toyota MR2 (MR-S)
We're recommending the third and final version of Toyota's mid-engined sports car, supposedly inspired by Porsche's Boxster.
Some had a six-speed Sequential Manual Transmission that, at a touch of the lever, did amazing "double declutching" downshifts that made even the clumsiest driver seem like an expert.
A feisty, good-handling car, this ultimate version of the MR2 was possibly the best, although each generation has its adherents.
From $21,000
Driven recommends
Just as "nobody ever got sacked for specifying IBM" - as the saying went - Driven's going to take the safe route and go with the MX-5, because it's the "universal" roadster that everyone likes and it's backed by a huge parts and service infrastructure. That's not taking anything away from the other two, though.