The removal is simple if you have a TIG welder
https://www.thehighroad.org/index.p...-stripped-out-setscrews.875066/#post-11641905
I say easy, once someone drills a hole off center, into the threads and breaks an EZ out off in it, they just made things worse than if they did nothing after breaking the thing off. So sometimes it’s best to take it to someone that knows what they are doing.
I can see a business charging that amount, most machine shops are not a walk-in, one item kind of place.
That said, if the agreed on price/cost was $50, I would expect the bill to be that and at most + tax. Unless I received a phone call that the estimate would not cover the work required.
I wouldn’t pay $115 but I look at that and know that it will take me a few minutes to do. Same reason I repaired a 3/4” PVC pipe at my Nieces house the cows broke off, that a plumber quoted her $250 for the repair. That doesn’t even involve very special tools or skills. Remove 16” or so of dirt, cut pipe, primer, glue push $.20 cent part on, repeat and done, except I added in a T post to keep it from happening again.
Of course I then go into the City with my wife for a fancy dinner and pay stupid prices for a dinner and enough on one drink, I could have purchased the ingredients at a store and made them all week myself for less...