Fixing or replacing a concrete patio
A patio with a few hairline cracks that's still flat and solid can usually be cleaned up and sealed, and I'll tell you so instead of selling you a new one. When the slab has sunk, tilted or broken into pieces that rock underfoot, the trouble is in the ground beneath it, and patching the top won't fix that. In that case we break it out, rebuild the base and pour fresh.
What sets the price of a concrete patio
Size is the biggest part, followed by any old concrete we have to break out and haul off and how far the crew has to wheel materials to reach your backyard. A slab built for a shed costs more than one for patio chairs, and a decorative finish costs more than a broom finish. If the budget is tight, I'd trim the finish before the base, because the base is buried on day one and decides how the patio holds up.