We'll just have to see on that - it depends a lot on how many times the 1st stage can be reused, how much the refurbishment costs, and what the risk involved is. The first launch is pretty low-risk at this point, but how risky is the tenth launch on the same 1st stage?
IIRC, they are on record as wanting to eventually recover the 2nd stage as well. It's a much tougher problem though - the 2nd stage has much higher velocity at engine cutoff, its engine is a variant designed to operate in vacuum and reportedly can't be made to operate in the atmosphere easily, and any additional hardware added to the 2nd stage has a much higher penalty on the rocket's performance than on the 1st.
IIRC, they are on record as wanting to eventually recover the 2nd stage as well. It's a much tougher problem though - the 2nd stage has much higher velocity at engine cutoff, its engine is a variant designed to operate in vacuum and reportedly can't be made to operate in the atmosphere easily, and any additional hardware added to the 2nd stage has a much higher penalty on the rocket's performance than on the 1st.