What types are you looking at?
The really expensive one was the surface book 2 ($2500 ish....)
Ideally I'd want one that detaches from the keyboard, I've got a (very broken) surface pro at the moment and I don't like having the stand at the back, which is why I love the surface book - it's detachable but the hinge holds it up, not a stand.
Most of the convertible ones I was looking at just flip over, which I don't really mind but the ones I was looking at (Dell Inspiron and Lenovo yoga) have a pretty crap battery life which is not ideal.
I only really want a convertible one because it's what I'm used to, it's not super necessary but would be nice. Don't think I'm going to find a convertible laptop with a decent battery that isn't a few thousand dollars though haha