So i was browsing the for sale thread and i was inquiring on a turbo i was interested in. The seller says one of the blades is missing a chunk seems like something damaged one of the blades on the exh wheel maybe a spark plug tip, he said it still worked great, does it matter that one of the blades is damaged? Does it need to be changed, or ok to run like that.. What should i pay for a turbo with that type of damage.