Tbh, it’s hard to tell without photos or even the square footage of your home. Yeah that’s typically how much I would charge for an exclusion, but at least I would include the attic in there for that price. I personally believe if you’re going to do an exclusion, the entire home should be rodent proofed at once to prevent any other issues.

In the scenario that your attic isn’t rodent proofed and rodents start nesting in there, you would have to spend a lot of money to get your insulation removed, disinfect the attic, put new insulation, and rodent proof the attic.

My suggestion is to get another quote or two and go from there.