When it comes to cheap fun convertibles, I always have those 3 in mind.
I wanted to write some interesting stuff about those, but as I started I got trapped in a car search loop.

So quick one:
CRX Del Sol
Cheap +
Easy to work on +
FWD -

MX-5
Cheap ++
Easy to work on +
RWD +
Headlights go up +++

MR2
Relatively expensive -
More complicated to work on -
RWD +
Rear engine +
Head lights go down +++