I also live in CT and have a 700’ elevation change everyday on my way to and from work. I’m surprised at 50K you’re experiencing this though. I only have 17K on my HAH right now so can’t compare exactly but my previous car was a HCH and with the same commute it didn’t experience it’s first brake job till after 100K, and that was the fronts. To be honest I think my rears are still original at over 200K and the Civic’s regen is significantly less than the accord for downhill driving. Either way, based on your description it does sound like you need a new set on the rear. And as far as prices go for CT, that sounds a bit on the high side but not by much.YES! Have a "mountain" I cross over at least 2x day, 500' elevation rise, 2 miles up and 2 miles down.
Steep enough that there's a runaway truck ramp