Hello Mark,
Owned my similar aged car, to the one you are considering, for three years soon. Purchased with 8k, now reached 20k. As many F-Types are, mine garaged all year & driven mainly on sunny weekends.
Issues...
Active Exhaust - They fail, cannot comment on frequency, & need replacing. Simple check on inspection. Back back replaced on mine.
Differential Leak - Known Issue easily fixed with new seal.
Surface Rust Sub-Frame - Another known issue but even if out of warranty, three parts easily purchased & fitted by competent garage.
Engine wise never skipped a beat. Keep on top of service & niggles that occur. The V6 & V8 engines are strong & proven reliable. The ZF 8 Speed Auto Gearbox even more so. The Germans are ditching the DCT & fitting ours instead.
Do your homework, use common sense & you cannot go wrong. Example, someone sold a SVR last year. Owner loved broadcasting his quarter-mile times. A car I would steer clear of. Think other owner purchased an ex-Jaguar press car. Soon after they watched a video of it being ragged sideways around a track. Again, buyer beware.
Lots of low-mileage garage queens out there. Good Luck