Call 16053402412 or come by 631 Saint Anne St, Rapid City, SD 57701. On the phone, the fastest way to get an accurate number is to have three things ready: the door size (single or double), what it's doing wrong (won't open, makes noise, came off track, spring snapped), and roughly how old the door or opener is. If you know the brand stamped on the opener unit, that helps too - parts availability varies and we'd rather tell you that before a truck is on the way than after.
We can give you a range over the phone for common jobs like a torsion spring replacement, but the firm number comes after we see the door. Anything involving a bent track, water damage to the panels, or an opener that's stopped responding to remotes gets a quote on site, because guessing at that over the phone just means we're wrong in one direction or the other.