Set of 6 Windsor Chairs with rush seats

These are 6 chairs that I came across at a local second hand store. They are all worn but only 2 have actual breaks in the wood and one has unfurling rush on the seat.  Each one is slightly wobbly in the back joints.

I don't ususally deal in antiques so I'd like to know more about them, what kind of wood, what they are worth, and if they would be valuable enough to have professionally repaired. I'm open to any and all suggestions. For the price I paid, I can be very flexible.

Poor