Yes. Fix it yourself. :)
Caliper can be unseized. Don't even need a new bolt if done properly.
But steps will be something like this:
jackup the car, use stands, remove wheel
remove brake caliper
Disconnect brake lines and plug them so it doesnt leak
take the caliper and soak it in penetrant like wd40 penetrant for a day or two
take the caliper and hammer it with small hammer to break the rust weld.
When pin is free, clean it, sand it and polish it. re assemble.
If you take your time, all you will spend is 6 pounds on Ceratech grease for the pin/bolt, 5 pounds on Dot 5.1.brake fluid flush, and may.be 7 pounds on caliper paint if you want to paint it.
Tools you will need is another thing if you dont have them. Ask indie if they can do this for.you...