Gunsmith on the west side

I’ve got a .410 that my dad bought when he was a kid in the 60’s. It’s been sitting in a closet for 15+ years and hasn’t been fired in almost 20 years. I want to get it professionally cleaned and checked out before I try to fire it. I’ve checked with one place near me and it was $150. I’ve never had a gun serviced so I’m trying to get some other quotes but I’m having a hard time finding other gunsmiths. Any help would be greatly appreciated