It's not clear if (s)he replaced the crankset and made everything better, of if this is the crankset that was causing the problem and it has been replaced.
No, it is clear--it is the latter. She/he now has another crankset on the bike and is selling the defective one.
No, it is clear--it is the latter. She/he now has another crankset on the bike and is selling the defective one.