I bought my TF 6 years ago and apart from a drivers door lock problem it has been fine but it is / was low mileage. You have be prepared to put money into a car that has by now been through several owners who may have neglected certain areas . This was the case with mine . I have taken my TF to France every year ( apart from this year ) and it has not missed a beat .
Your comment about it being nice to drive is correct but be careful when driving in the wet as they can catch you out and without stating the obvious, they will not behave as a front wheel drive car . Press the loud pedal too hard when on a bend / corner and you will need an armful of opposite lock .
John