A buckled or kerbed alloy is usually repairable, and repairing it is normally a fraction of the cost of replacing one — which matters most when the damaged rim is part of a matched set you cannot buy a single replacement for.
Damage comes in three broad kinds and they are not equally fixable. A buckle, where the rim has bent out of true, is straightened under controlled pressure. Kerb rash and scuffing is a cosmetic job, machined back and refinished. A crack can sometimes be welded — but only in the right location, and only where the wheel's structure allows it.
We assess every rim before quoting, free, and we will tell you plainly when a wheel should not be repaired. A crack through a spoke or across the mounting face is not a repair job at any price; that wheel needs replacing, and we would rather lose the work than send out a wheel we do not trust.