^^^ Some shops don't survive long term either... The OP's prices are what we pay... but the shops here are older guys with most of their machines long ago paid off. Plus they buy used major tooling (both shops' Serdi machines came used from NASCAR race shops not far away) and they are pretty creative with improving and modifying their tools. And this is a rural area, so there is just not as much money floating around, and so sometimes the local economic market simply sets the pricing that can be gotten.
There IS a shop up on the next county that will charge $400-500 for an impressively automated and VERY precise decking job!