We don't have a posted price list here, because the cost swings a lot based on whether it's a spring, a cable, a roller, or an opener board, and whether the door is a single or double. What we can tell you is what drives the number up in this area: doors from the older part of the housing stock (built as far back as 1943) sometimes use hardware sizes or mounting styles that newer stock doors don't carry, which means a slightly longer job even for something simple like a roller swap. Newer builds, closer to the 2011 end of the range, tend to use parts that are easier to match off the truck.
The honest limitation: if your door is original to a house built in the 1940s or 50s, there's a real chance the exact panel or track hardware isn't something we can match on the spot, and we'd rather tell you that up front than quote a number and miss it. We'll give you a firm price once we've seen the door and know which category it falls into.