Any exterminator recommendations?

My grandma and I have been having a problem with small roaches in a small section of the house. We cleaned up everything and bought some traps and got rid of them a few months ago but now they're coming back. She wants to hire an exterminator, which I do believe we need at this point, but she always hires folks that just come and spray a toxic bomb around the whole house and just dip. I'm interested in an exterminator that's going to actually evaluate what's going on and deal with the situation appropriately. Any recommendations? Price estimation would be nice too.